| Congress | Name | Party | Data of Commence | Data of Termination | Major/Min | Rank | Senior Party Member | Committee Seniority | Committee Period of Service | Committee status at end of this Congress | Committee continuity of assignment in next Congress | Appointment Citation | District | Committee Name | Notes |
| 110 | Harkin, Tom | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Leahy, Patrick J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 33 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Conrad, Kent | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Baucus, Max | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Lincoln, Blanche Lambert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Stabenow, Deborah Ann | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Nelson, Earl Benjamin (Ben) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Salazar, Kenneth Lee | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | Appointed U.S. Secretary of the Interior |
| 110 | Brown, Sherrod | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Casey, Robert P., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Klobuchar, Amy | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Chambliss, Saxby | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Lugar, Richard G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Cochran, Thad | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | McConnell, Mitch | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Roberts, Pat | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Graham, Lindsey O. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | Transferred to Homeland Security and Governmental Affairs and to Aging |
| 110 | Coleman, Norm | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | Defeated for reelection |
| 110 | Crapo, Michael Dean | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | Transferred to Environment and Public Works and to Indian Affairs |
| 110 | Thune, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Grassley, Charles E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 5 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 110 | Byrd, Robert C. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 49 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Appropriations | No |
| 110 | Inouye, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 37 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Appropriations | No |
| 110 | Leahy, Patrick J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 30 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Appropriations | No |
| 110 | Harkin, Tom | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Mikulski, Barbara A. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Appropriations | No |
| 110 | Kohl, Herbert H. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Appropriations | No |
| 110 | Murray, Patty | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Appropriations | No |
| 110 | Dorgan, Byron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Appropriations | No |
| 110 | Feinstein, Dianne | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 9 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Appropriations | No |
| 110 | Durbin, Richard J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Johnson, Tim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Landrieu, Mary L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 12 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Reed, Jack | Democrat | 2007/1/12 | 2009/1/21 | Majority | 13 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Lautenberg, Frank R. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 14 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Appropriations | No |
| 110 | Nelson, Earl Benjamin (Ben) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 15 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Appropriations | No |
| 110 | Cochran, Thad | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Appropriations | No |
| 110 | Stevens, Ted | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 35 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Appropriations | Defeated for reelection |
| 110 | Specter, Arlen | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | Domenici, Pete V. | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 25 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Appropriations | Retired from the Senate at the end of the Congress |
| 110 | Bond, Christopher S. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | McConnell, Mitch | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Appropriations | No |
| 110 | Shelby, Richard C. | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | Gregg, Judd | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | Bennett, Robert F. | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | Craig, Larry E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Appropriations | Retired from the Senate at the end of the Congress |
| 110 | Hutchison, Kay Bailey | Republican | 2007/1/12 | 2009/1/21 | Minority | 11 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Appropriations | No |
| 110 | Brownback, Samuel Dale | Republican | 2007/1/12 | 2009/1/21 | Minority | 12 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Appropriations | No |
| 110 | Allard, Wayne | Republican | 2007/1/12 | 2009/1/21 | Minority | 13 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Appropriations | Retired from the Senate at the end of the Congress |
| 110 | Alexander, Lamar | Republican | 2007/1/12 | 2009/1/21 | Minority | 14 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Appropriations | No |
| 110 | Levin, Carl | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Armed Services | No |
| 110 | Kennedy, Edward M. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 25 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | Byrd, Robert C. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | Lieberman, Joseph I. | Independent | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 110 | Reed, Jack | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Armed Services | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | Nelson, Earl Benjamin (Ben) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | Bayh, Evan | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Armed Services | No |
| 110 | Clinton, Hillary Rodham | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Armed Services | Appointed U.S. Secretary of State |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 2nd Class | Armed Services | Transferred to Appropriations |
| 110 | Webb, Jim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | McCaskill, Claire | Democrat | 2007/1/12 | 2009/1/21 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Armed Services | No |
| 110 | McCain, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Armed Services | No |
| 110 | Warner, John W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Armed Services | Retired from the Senate at the end of the Congress |
| 110 | Inhofe, James M. | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Armed Services | No |
| 110 | Sessions, Jeff | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Armed Services | No |
| 110 | Collins, Susan | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Armed Services | No |
| 110 | Ensign, John Eric | Republican | 2007/1/12 | 2007/7/17 | Minority | 6 | Inapplicable | 5 | Only period of service | Transferred to another committee | Continues in congress, but not committee | S. Res. 28 | Senate, 1st Class | Armed Services | Transferred to Finance |
| 110 | Chambliss, Saxby | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Armed Services | No |
| 110 | Graham, Lindsey O. | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Armed Services | No |
| 110 | Dole, Elizabeth Hanford | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Armed Services | Defeated for reelection |
| 110 | Cornyn, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 5 | First period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 1st Class | Armed Services | Transferred to Finance |
| 110 | Thune, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 11 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Armed Services | No |
| 110 | Martinez, Melquiades R. (Mel) | Republican | 2007/1/12 | 2009/1/21 | Minority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Armed Services | No |
| 110 | Corker, Bob | Republican | 2007/7/17 | 2008/1/24 | | 1 | Inapplicable | 1 | Only period of service | | Continues in congress, but not committee | S. Res. 225 | Senate, 1st Class | Armed Services | Replaced Ensign |
| 110 | Wicker, Roger F. | Republican | 2008/1/24 | 2009/1/21 | | 2 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES425 | Senate, 1st Class | Armed Services | Replaced Corker |
| 110 | Dodd, Christopher, J | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Johnson, Tim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Reed, Jack | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Bayh, Evan | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Carper, Thomas Richard | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | Transferred to Finance |
| 110 | Menendez, Robert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 110 | Brown, Sherrod | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 110 | Casey, Robert P., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | Transferred to Health, Education, Labor, and Pensions |
| 110 | Tester, Jon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 110 | Shelby, Richard C. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Bennett, Robert F. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Allard, Wayne | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | Retired from the Senate at the end of the Congress |
| 110 | Enzi, Michael B. | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | Transferred to Finance |
| 110 | Hagel, Chuck | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | Retired from the Senate at the end of the Congress |
| 110 | Bunning, James Paul David | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Crapo, Michael Dean | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Sununu, John E. | Republican | 2007/1/12 | 2008/1/24 | Minority | 8 | Inapplicable | 5 | Only period of service | Transferred to another committee | Inapplicable | S. Res. 28 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | Transferred to Finance |
| 110 | Dole, Elizabeth Hanford | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | Defeated for reelection |
| 110 | Martinez, Melquiades R. (Mel) | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 110 | Corker, Bob | Republican | 2008/1/24 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES425 | Senate, 1st Class | Banking, Housing, and Urban Affairs | Replaced Sununu |
| 110 | Conrad, Kent | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Murray, Patty | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Budget | No |
| 110 | Wyden, Ron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 12 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Budget | No |
| 110 | Feingold, Russel D. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Budget | No |
| 110 | Byrd, Robert C. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Stabenow, Deborah Ann | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Menendez, Robert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Cardin, Benjamin L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Lautenberg, Frank R. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 2nd Class | Budget | Left committee for no other |
| 110 | Sanders, Bernard | Independent | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Budget | No |
| 110 | Whitehouse, Sheldon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Budget | No |
| 110 | Gregg, Judd | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Budget | No |
| 110 | Domenici, Pete V. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 33 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Budget | Retired from the Senate at the end of the Congress |
| 110 | Grassley, Charles E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Budget | No |
| 110 | Allard, Wayne | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Budget | Retired from the Senate at the end of the Congress |
| 110 | Enzi, Michael B. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Budget | No |
| 110 | Sessions, Jeff | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Budget | No |
| 110 | Bunning, James Paul David | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Budget | No |
| 110 | Crapo, Michael Dean | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Budget | No |
| 110 | Ensign, John Eric | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Budget | No |
| 110 | Cornyn, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Budget | No |
| 110 | Graham, Lindsey O. | Republican | 2007/1/12 | 2009/1/21 | Minority | 12 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Budget | No |
| 110 | Inouye, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 39 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Rockefeller, John D., IV | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 110 | Kerry, John F. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 110 | Dorgan, Byron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Boxer, Barbara | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Cantwell, Maria | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Lautenberg, Frank R. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 110 | Carper, Thomas Richard | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Commerce, Science, and Transportation | Transferred to Finance |
| 110 | McCaskill, Claire | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Klobuchar, Amy | Democrat | 2007/1/12 | 2009/1/21 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Stevens, Ted | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:1st ranking minority member | 27 | Second period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Commerce, Science, and Transportation | Defeated for reelection |
| 110 | McCain, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Commerce, Science, and Transportation | Transferred to Energy and Natural Resources; Homeland Security and Governmental Affairs; and Health, Education, Labor, and Pensions |
| 110 | Lott, Trent | Republican | 2007/1/12 | 2007/12/18 | Minority | 3 | Inapplicable | 19 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Commerce, Science, and Transportation | Resigned from the Senate |
| 110 | Hutchison, Kay Bailey | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Ranking Minority Members:2nd ranking minority member | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Commerce, Science, and Transportation | Named ranking minority member 7/30/2008, SRES635 |
| 110 | Snowe, Olympia J. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 13 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Smith, Gordon H. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Commerce, Science, and Transportation | Defeated for reelection |
| 110 | Ensign, John Eric | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 110 | Sununu, John E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Commerce, Science, and Transportation | Defeated for reelection |
| 110 | DeMint, James W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Vitter, David | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Thune, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 110 | Wicker, Roger F. | Republican | 2008/1/24 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES425 | Senate, 1st Class | Commerce, Science, and Transportation | Replaced Lott |
| 110 | Bingaman, Jeff | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Energy and Natural Resources | Left committee for no other |
| 110 | Dorgan, Byron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Wyden, Ron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Johnson, Tim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Energy and Natural Resources | No |
| 110 | Landrieu, Mary L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Energy and Natural Resources | No |
| 110 | Cantwell, Maria | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Salazar, Kenneth Lee | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 3rd Class | Energy and Natural Resources | Appointed U.S. Secretary of the Interior |
| 110 | Menendez, Robert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Lincoln, Blanche Lambert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Sanders, Bernard | Independent | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Tester, Jon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Domenici, Pete V. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 30 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Energy and Natural Resources | Retired from the Senate at the end of the Congress |
| 110 | Craig, Larry E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Energy and Natural Resources | Retired from the Senate at the end of the Congress |
| 110 | Thomas, Craig | Republican | 2007/1/12 | 2007/6/4 | Minority | 3 | Inapplicable | 13 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Energy and Natural Resources | Died |
| 110 | Murkowski, Lisa | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Burr, Richard | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | DeMint, James W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 266 | Senate, 3rd Class | Energy and Natural Resources | Replaced Thomas; transferred to Banking, Housing, and Urban Affairs |
| 110 | Smith, Gordon H. | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Energy and Natural Resources | Defeated for reelection |
| 110 | Bunning, James Paul David | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 5 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Energy and Natural Resources | No |
| 110 | Martinez, Melquiades R. (Mel) | Republican | 2007/1/12 | 2009/1/21 | Minority | 11 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Energy and Natural Resources | Transferred to Commerce, Science, and Transportation |
| 110 | Corker, Bob | Republican | 2007/1/12 | 2009/1/21 | | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Sessions, Jeff | Republican | 2007/1/12 | 2009/1/21 | | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 2nd Class | Energy and Natural Resources | No |
| 110 | Barrasso, John A. | Republican | 2007/7/10 | 2009/1/21 | | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 1st Class | Energy and Natural Resources | No |
| 110 | Boxer, Barbara | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Environment and Public Works | No |
| 110 | Baucus, Max | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Environment and Public Works | No |
| 110 | Lieberman, Joseph I. | Independent | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Environment and Public Works | Lieberman caucused with the Democrats, so is classified with the majority party members.; left committee for no other |
| 110 | Carper, Thomas Richard | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Environment and Public Works | No |
| 110 | Clinton, Hillary Rodham | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Environment and Public Works | Appointed U.S. Secretary of State |
| 110 | Lautenberg, Frank R. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 3 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Environment and Public Works | No |
| 110 | Cardin, Benjamin L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Environment and Public Works | No |
| 110 | Sanders, Bernard | Independent | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Environment and Public Works | No |
| 110 | Klobuchar, Amy | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Environment and Public Works | No |
| 110 | Whitehouse, Sheldon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Environment and Public Works | No |
| 110 | Inhofe, James M. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Environment and Public Works | No |
| 110 | Warner, John W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Environment and Public Works | Retired from the Senate at the end of the Congress |
| 110 | Voinovich, George Victor | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Environment and Public Works | No |
| 110 | Isakson, Johnny | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Environment and Public Works | Transferred to Commerce, Science, and Transportation |
| 110 | Vitter, David | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Environment and Public Works | No |
| 110 | Craig, Larry E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Environment and Public Works | Retired from the Senate at the end of the Congress |
| 110 | Alexander, Lamar | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Environment and Public Works | No |
| 110 | Thomas, Craig | Republican | 2007/1/12 | 2007/6/4 | Minority | 8 | Inapplicable | 1 | Third period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Environment and Public Works | Died |
| 110 | Bond, Christopher S. | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Environment and Public Works | No |
| 110 | Barrasso, John A. | Republican | 2007/7/10 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 1st Class | Environment and Public Works | Replaced Thomas |
| 110 | Baucus, Max | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Finance | No |
| 110 | Rockefeller, John D., IV | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Finance | No |
| 110 | Conrad, Kent | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Finance | No |
| 110 | Bingaman, Jeff | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Finance | No |
| 110 | Kerry, John F. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 6 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Finance | No |
| 110 | Lincoln, Blanche Lambert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Finance | No |
| 110 | Wyden, Ron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Finance | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Finance | No |
| 110 | Stabenow, Deborah Ann | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Finance | No |
| 110 | Cantwell, Maria | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Finance | No |
| 110 | Salazar, Kenneth Lee | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Finance | No |
| 110 | Grassley, Charles E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 17 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Finance | No |
| 110 | Hatch, Orrin G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Finance | No |
| 110 | Lott, Trent | Republican | 2007/1/12 | 2007/12/18 | Minority | 3 | Inapplicable | 11 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Finance | Resigned from the Senate |
| 110 | Snowe, Olympia J. | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Finance | No |
| 110 | Kyl, Jon | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Finance | No |
| 110 | Thomas, Craig | Republican | 2007/1/12 | 2007/6/4 | Minority | 6 | Inapplicable | 7 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Finance | Died |
| 110 | Smith, Gordon H. | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Finance | Defeated for reelection |
| 110 | Bunning, James Paul David | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Finance | No |
| 110 | Crapo, Michael Dean | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Finance | No |
| 110 | Roberts, Pat | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Finance | No |
| 110 | Ensign, John Eric | Republican | 2007/7/10 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 1st Class | Finance | Replaced Thomas |
| 110 | Sununu, John E. | Republican | 2008/1/24 | 2009/1/21 | | 2 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES425 | Senate, 2nd Class | Finance | Replaced Lott |
| 110 | Biden, Joseph R., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 33 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 2nd Class | Foreign Relations | Elected vice president of the U.S. |
| 110 | Dodd, Christopher, J | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Foreign Relations | No |
| 110 | Kerry, John F. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Foreign Relations | No |
| 110 | Feingold, Russel D. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Foreign Relations | No |
| 110 | Boxer, Barbara | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Foreign Relations | No |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Foreign Relations | Transferred to Finance |
| 110 | Obama, Barack | Democrat | 2007/1/12 | 2008/11/16 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 3rd Class | Foreign Relations | Elected president of the U.S. |
| 110 | Menendez, Robert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Foreign Relations | No |
| 110 | Cardin, Benjamin L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Foreign Relations | No |
| 110 | Casey, Robert P., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Foreign Relations | No |
| 110 | Webb, Jim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Foreign Relations | No |
| 110 | Lugar, Richard G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Foreign Relations | No |
| 110 | Hagel, Chuck | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Foreign Relations | Retired from the Senate at the end of the Congress |
| 110 | Coleman, Norm | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Foreign Relations | Defeated for reelection |
| 110 | Corker, Bob | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Foreign Relations | No |
| 110 | Sununu, John E. | Republican | 2007/1/12 | 2008/1/12 | Minority | 5 | Inapplicable | 5 | Only period of service | Transferred to another committee | Inapplicable | S. Res. 28 | Senate, 2nd Class | Foreign Relations | Transferred to Finance |
| 110 | Voinovich, George Victor | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Foreign Relations | Transferred to Appropriations |
| 110 | Murkowski, Lisa | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Foreign Relations | Transferred to Appropriations |
| 110 | DeMint, James W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Foreign Relations | No |
| 110 | Isakson, Johnny | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Foreign Relations | No |
| 110 | Vitter, David | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Foreign Relations | Transferred to Armed Services and To Banking, Housing, and Urban Affairs |
| 110 | Barrasso, John A. | Republican | 2008/1/12 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES448 | Senate, 1st Class | Foreign Relations | Replaced Sununu |
| 110 | Lieberman, Joseph I. | Independent | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Homeland Security and Governmental Affairs | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 110 | Levin, Carl | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 110 | Carper, Thomas Richard | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 110 | Landrieu, Mary L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 110 | Obama, Barack | Democrat | 2007/1/12 | 2008/11/16 | Majority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Elected president of the U.S. |
| 110 | McCaskill, Claire | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 110 | Tester, Jon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 110 | Collins, Susan | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 110 | Stevens, Ted | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 8 | Second period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Defeated for reelection |
| 110 | Voinovich, George Victor | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 110 | Coleman, Norm | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Defeated for reelection |
| 110 | Coburn, Thomas Allen | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 110 | Domenici, Pete V. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Retired from the Senate at the end of the Congress |
| 110 | Warner, John W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Retired from the Senate at the end of the Congress |
| 110 | Sununu, John E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Defeated for reelection |
| 110 | Leahy, Patrick J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Judiciary | No |
| 110 | Kennedy, Edward M. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 44 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Judiciary | Left committee for no other |
| 110 | Biden, Joseph R., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 30 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 2nd Class | Judiciary | Elected vice president of the U.S. |
| 110 | Kohl, Herbert H. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Judiciary | No |
| 110 | Feinstein, Dianne | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Judiciary | No |
| 110 | Feingold, Russel D. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Judiciary | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Judiciary | No |
| 110 | Durbin, Richard J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 7 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Judiciary | No |
| 110 | Cardin, Benjamin L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Judiciary | No |
| 110 | Whitehouse, Sheldon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Judiciary | No |
| 110 | Specter, Arlen | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Judiciary | No |
| 110 | Hatch, Orrin G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Judiciary | No |
| 110 | Grassley, Charles E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Judiciary | No |
| 110 | Kyl, Jon | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Judiciary | No |
| 110 | Sessions, Jeff | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Judiciary | No |
| 110 | Graham, Lindsey O. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Judiciary | No |
| 110 | Cornyn, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Judiciary | No |
| 110 | Brownback, Samuel Dale | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 3 | Second period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Judiciary | Transferred to Commerce, Science, and Transportation; Energy and Natural Resources; and Aging |
| 110 | Coburn, Thomas Allen | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Judiciary | No |
| 110 | Kennedy, Edward M. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 44 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 110 | Dodd, Christopher, J | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Harkin, Tom | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 110 | Mikulski, Barbara A. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Bingaman, Jeff | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 11 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 110 | Murray, Patty | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Reed, Jack | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 110 | Clinton, Hillary Rodham | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Health, Education, Labor, and Pensions | Appointed U.S. Secretary of State |
| 110 | Obama, Barack | Democrat | 2007/1/12 | 2008/11/16 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 3rd Class | Health, Education, Labor, and Pensions | Elected president of the U.S. |
| 110 | Sanders, Bernard | Independent | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 110 | Brown, Sherrod | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 110 | Enzi, Michael B. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 110 | Gregg, Judd | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Alexander, Lamar | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 110 | Burr, Richard | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Isakson, Johnny | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Murkowski, Lisa | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Hatch, Orrin G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 3 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 110 | Roberts, Pat | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 110 | Allard, Wayne | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Health, Education, Labor, and Pensions | Retired from the Senate at the end of the Congress |
| 110 | Coburn, Thomas Allen | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 110 | Dodd, Christopher, J | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Rules and Administration | No |
| 110 | Byrd, Robert C. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 45 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Rules and Administration | No |
| 110 | Inouye, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 25 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Rules and Administration | No |
| 110 | Feinstein, Dianne | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Rules and Administration | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Rules and Administration | No |
| 110 | Durbin, Richard J. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Nelson, Earl Benjamin (Ben) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Rules and Administration | No |
| 110 | Reid, Harry | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 3rd Class | Rules and Administration | Majority leader; left committee for no other |
| 110 | Murray, Patty | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Rules and Administration | No |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Bennett, Robert F. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Rules and Administration | No |
| 110 | Stevens, Ted | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 23 | Second period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Rules and Administration | Defeated for reelection |
| 110 | McConnell, Mitch | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Cochran, Thad | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Lott, Trent | Republican | 2007/1/12 | 2007/12/18 | Minority | 5 | Inapplicable | 11 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Rules and Administration | Resigned from the Senate |
| 110 | Chambliss, Saxby | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Hutchison, Kay Bailey | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Rules and Administration | No |
| 110 | Hagel, Chuck | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Rules and Administration | Retired from the Senate at the end of the Congress |
| 110 | Alexander, Lamar | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Rules and Administration | No |
| 110 | Ensign, John Eric | Republican | 2008/1/24 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES425 | Senate, 1st Class | Rules and Administration | Replaced Lott |
| 110 | Kerry, John F. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Levin, Carl | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Harkin, Tom | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 22 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Lieberman, Joseph I. | Independent | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Small Business and Entrepreneurship | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 110 | Landrieu, Mary L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Cantwell, Maria | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 110 | Bayh, Evan | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Cardin, Benjamin L. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 110 | Tester, Jon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Small Business and Entrepreneurship | Transferred to Appropriations and to Indian Affairs |
| 110 | Snowe, Olympia J. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 110 | Bond, Christopher S. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 110 | Coleman, Norm | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Small Business and Entrepreneurship | Defeated for reelection |
| 110 | Vitter, David | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 110 | Dole, Elizabeth Hanford | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Small Business and Entrepreneurship | Defeated for reelection |
| 110 | Thune, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 110 | Corker, Bob | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 1st Class | Small Business and Entrepreneurship | Left committee for no other |
| 110 | Enzi, Michael B. | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 110 | Isakson, Johnny | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Rockefeller, John D., IV | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Veterans' Affairs | No |
| 110 | Murray, Patty | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Veterans' Affairs | No |
| 110 | Obama, Barack | Democrat | 2007/1/12 | 2008/11/16 | Majority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 27 | Senate, 3rd Class | Veterans' Affairs | Elected president of the U.S. |
| 110 | Sanders, Bernard | Independent | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Brown, Sherrod | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Webb, Jim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Tester, Jon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Craig, Larry E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:1st ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Veterans' Affairs | Retired from the Senate at the end of the Congress |
| 110 | Specter, Arlen | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Veterans' Affairs | No |
| 110 | Burr, Richard | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Ranking Minority Members:2nd ranking minority member | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Veterans' Affairs | Appointed ranking minority member 9/11/2007 |
| 110 | Isakson, Johnny | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Veterans' Affairs | No |
| 110 | Graham, Lindsey O. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Veterans' Affairs | No |
| 110 | Hutchison, Kay Bailey | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Veterans' Affairs | Transferred to Banking, Housing, and Urban Affairs |
| 110 | Ensign, John Eric | Republican | 2007/1/12 | 2008/1/24 | Minority | 7 | Inapplicable | 5 | Only period of service | | Continues in congress, but not committee | S. Res. 28 | Senate, 1st Class | Veterans' Affairs | No |
| 110 | Wicker, Roger F. | Republican | 2008/1/24 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES425 | Senate, 1st Class | Veterans' Affairs | Replaced Ensign |
| 110 | Kohl, Herbert H. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | No |
| 110 | Wyden, Ron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 12 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Lincoln, Blanche Lambert | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Bayh, Evan | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Carper, Thomas Richard | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | Transferred to Finance |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | No |
| 110 | Clinton, Hillary Rodham | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | Appointed U.S. Secretary of State |
| 110 | Salazar, Kenneth Lee | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 3rd Class | Aging (Special Committee) | Appointed U.S. Secretary of the Interior |
| 110 | Casey, Robert P., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | No |
| 110 | McCaskill, Claire | Democrat | 2007/1/12 | 2009/1/21 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Aging (Special Committee) | No |
| 110 | Whitehouse, Sheldon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Smith, Gordon H. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Aging (Special Committee) | Defeated for reelection |
| 110 | Shelby, Richard C. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Collins, Susan | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Aging (Special Committee) | No |
| 110 | Martinez, Melquiades R. (Mel) | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Craig, Larry E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Aging (Special Committee) | Retired from the Senate at the end of the Congress |
| 110 | Dole, Elizabeth Hanford | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Aging (Special Committee) | Defeated for reelection |
| 110 | Coleman, Norm | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Aging (Special Committee) | Defeated for reelection |
| 110 | Vitter, David | Republican | 2007/1/12 | 2009/1/21 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Aging (Special Committee) | Transferred to Armed Services and To Banking, Housing, and Urban Affairs |
| 110 | Corker, Bob | Republican | 2007/1/12 | 2009/1/21 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Aging (Special Committee) | No |
| 110 | Specter, Arlen | Republican | 2007/1/12 | 2009/1/21 | Minority | 10 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Aging (Special Committee) | No |
| 110 | Rockefeller, John D., IV | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 110 | Feinstein, Dianne | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 110 | Wyden, Ron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Bayh, Evan | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Mikulski, Barbara A. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Feingold, Russel D. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Nelson, Clarence William (Bill) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 110 | Whitehouse, Sheldon | Democrat | 2007/1/12 | 2009/1/21 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Levin, Carl | Democrat | 2007/1/12 | 2009/1/21 | Majority | 9 | Inapplicable | 11 | Only period of service | Transferred to another committee | Continues in congress, but not committee | S. Res. 27 | Senate, 2nd Class | Intelligence (Select Committee) | Ex officio member; left committee for no other |
| 110 | Bond, Christopher S. | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Warner, John W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 5 | Third period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Intelligence (Select Committee) | Retired from the Senate at the end of the Congress |
| 110 | Hagel, Chuck | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Intelligence (Select Committee) | Retired from the Senate at the end of the Congress |
| 110 | Chambliss, Saxby | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 110 | Hatch, Orrin G. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 110 | Snowe, Olympia J. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 110 | Burr, Richard | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 110 | Johnson, Tim | Democrat | 2007/1/12 | 2008/3/31 | Majority | 1 | Committee Chairmen:1st Chairman | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Ethics (Select Committee) | Senator Johnson is Chair of the Select Committee on Ethics during his absence for all purposes under Senate Rules Committee Rules relevant statutes Senator Boxer shall act as Chair of the Select Committee on Ethics except for purposes of the designation under 2 USC Sec 72a-1f; Johnson removed from committee by SRES492 |
| 110 | Boxer, Barbara | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Committee Chairmen:2nd Chairman | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Ethics (Select Committee) | Senator Johnson is Chair of the Select Committee on Ethics during his absence for all purposes under Senate Rules Committee Rules relevant statutes Senator Boxer shall act as Chair of the Select Committee on Ethics except for purposes of the designation under 2 USC Sec 72a-1f; Boxer made chair on 3/31/2008 by SRES492 |
| 110 | Pryor, Mark | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 110 | Salazar, Kenneth Lee | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 27 | Senate, 3rd Class | Ethics (Select Committee) | Appointed U.S. Secretary of the Interior |
| 110 | Cornyn, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 1st Class | Ethics (Select Committee) | Transferred to Finance |
| 110 | Roberts, Pat | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 110 | Thomas, Craig | Republican | 2007/1/12 | 2007/6/4 | Minority | 3 | Inapplicable | 7 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Ethics (Select Committee) | Died |
| 110 | Isakson, Johnny | Republican | 2007/7/13 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 233 | Senate, 3rd Class | Ethics (Select Committee) | Replaced Thomas |
| 110 | Dorgan, Byron | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 110 | Inouye, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 110 | Conrad, Kent | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 110 | Akaka, Daniel K. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 110 | Johnson, Tim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 110 | Cantwell, Maria | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 110 | Thomas, Craig | Republican | 2007/1/12 | 2007/6/4 | Minority | 1 | Ranking Minority Members:1st ranking minority member | 13 | Only period of service | | Inapplicable | S. Res. 28 | Senate, 1st Class | Indian Affairs (Select Committee) | Died |
| 110 | McCain, John | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 110 | Murkowski, Lisa | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Ranking Minority Members:2nd ranking minority member | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Indian Affairs (Select Committee) | Appointed ranking minority member 7/10/2007 |
| 110 | Coburn, Thomas Allen | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 110 | Domenici, Pete V. | Republican | 2007/1/12 | 2009/1/21 | Minority | 5 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Indian Affairs (Select Committee) | Retired from the Senate at the end of the Congress |
| 110 | Smith, Gordon H. | Republican | 2007/1/12 | 2009/1/21 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Indian Affairs (Select Committee) | Defeated for reelection |
| 110 | Burr, Richard | Republican | 2007/1/12 | 2009/1/21 | Minority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S. Res. 28 | Senate, 3rd Class | Indian Affairs (Select Committee) | Transferred to Armed Services |
| 110 | Barrasso, John A. | Republican | 2007/7/10 | 2009/1/21 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 266 | Senate, 1st Class | Indian Affairs (Select Committee) | Replaced Thomas; to rank after Coburn |
| 110 | Feinstein, Dianne | Democrat | 2007/3/26 | 2009/1/21 | Majority | 1 | Inapplicable | 1 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Library (Joint) | No |
| 110 | Dodd, Christopher, J | Democrat | 2007/3/26 | 2009/1/21 | Majority | 2 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Library (Joint) | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/3/26 | 2009/1/21 | Majority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Library (Joint) | No |
| 110 | Bennett, Robert F. | Republican | 2007/3/26 | 2009/1/21 | Minority | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Library (Joint) | No |
| 110 | Stevens, Ted | Republican | 2007/3/26 | 2009/1/21 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 98 | Senate, 2nd Class | Library (Joint) | Defeated for reelection |
| 110 | Feinstein, Dianne | Democrat | 2007/3/26 | 2009/1/21 | Majority | 1 | Inapplicable | 1 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 1st Class | Printing (Joint) | No |
| 110 | Inouye, Daniel K. | Democrat | 2007/3/26 | 2009/1/21 | Majority | 2 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Printing (Joint) | No |
| 110 | Murray, Patty | Democrat | 2007/3/26 | 2009/1/21 | Majority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Printing (Joint) | No |
| 110 | Bennett, Robert F. | Republican | 2007/3/26 | 2009/1/21 | Minority | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 3rd Class | Printing (Joint) | No |
| 110 | Chambliss, Saxby | Republican | 2007/3/26 | 2009/1/21 | Minority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 98 | Senate, 2nd Class | Printing (Joint) | No |
| 110 | Schumer, Charles Ellis (Chuck) | Democrat | 2007/1/12 | 2009/1/21 | Majority | 1 | Committee Chairmen:Only Chairman | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 110 | Kennedy, Edward M. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 2 | Inapplicable | 33 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Economic (Joint Committee) | No |
| 110 | Bingaman, Jeff | Democrat | 2007/1/12 | 2009/1/21 | Majority | 3 | Inapplicable | 21 | First period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Economic (Joint Committee) | No |
| 110 | Klobuchar, Amy | Democrat | 2007/1/12 | 2009/1/21 | Majority | 4 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Economic (Joint Committee) | No |
| 110 | Casey, Robert P., Jr. | Democrat | 2007/1/12 | 2009/1/21 | Majority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Economic (Joint Committee) | No |
| 110 | Webb, Jim | Democrat | 2007/1/12 | 2009/1/21 | Majority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 27 | Senate, 1st Class | Economic (Joint Committee) | No |
| 110 | Brownback, Samuel Dale | Republican | 2007/1/12 | 2009/1/21 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 110 | Sununu, John E. | Republican | 2007/1/12 | 2009/1/21 | Minority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | S. Res. 28 | Senate, 2nd Class | Economic (Joint Committee) | Defeated for reelection |
| 110 | DeMint, James W. | Republican | 2007/1/12 | 2009/1/21 | Minority | 3 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 110 | Bennett, Robert F. | Republican | 2007/1/12 | 2009/1/21 | Minority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S. Res. 28 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 110 | Durbin, Richard J. | Democrat | 2007/1/3 | 2009/1/3 | Majority | 1 | Majority Leadership:Only Majority Whip | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | NA | Senate, 2nd Class | Majority whip | No |
| 110 | Reid, Harry | Democrat | 2007/1/3 | 2009/1/3 | Majority | 1 | Majority Leadership:Only Majority Leader | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | NA | Senate, 3rd Class | Majority leader | No |
| 110 | Kyl, Jon | Republican | 2007/12/18 | 2009/1/3 | Minority | 1 | Minority Leadership:1st Minority Whip | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | NA | Senate, 1st Class | Minority whip | No |
| 110 | Lott, Trent | Republican | 2007/1/3 | 2007/12/18 | Minority | 1 | Minority Leadership:Only Minority Whip | 1 | Only period of service | | Inapplicable | NA | Senate, 1st Class | Minority whip | No |
| 110 | McConnell, Mitch | Republican | 2007/1/3 | 2009/1/3 | Minority | 1 | Minority Leadership:Only Minority Leader | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | NA | Senate, 2nd Class | Minority leader | No |
| 111 | Harkin, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:1st Chairman | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | Appointed chair of Health, Education, Labor, and Pensions 9/9/2009 |
| 111 | Leahy, Patrick J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 35 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Conrad, Kent | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Baucus, Max | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Lincoln, Blanche Lambert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Committee Chairmen:2nd Chairman | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | Appointed chair 9/9/2009; Defeated for reelection |
| 111 | Stabenow, Deborah Ann | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Nelson, Earl Benjamin (Ben) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Brown, Sherrod | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Casey, Robert P., Jr. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Klobuchar, Amy | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Bennett, Michael | Democrat | 2009/1/27 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S878 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | Late appointment |
| 111 | Gillibrand, Kirsten E. | Democrat | 2009/1/27 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S878 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | Late appointment |
| 111 | Chambliss, Saxby | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Lugar, Richard G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 33 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Cochran, Thad | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | McConnell, Mitch | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Roberts, Pat | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Johanns, Mike | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Grassley, Charles E. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 7 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Thune, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 111 | Cornyn, John | Republican | 2009/7/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | Late appointment |
| 111 | Inouye, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 39 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Appropriations | No |
| 111 | Byrd, Robert C. | Democrat | 2009/1/21 | 2010/6/29 | Majority | 2 | Inapplicable | 51 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Appropriations | Died 6/29/10 |
| 111 | Leahy, Patrick J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 32 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Appropriations | No |
| 111 | Harkin, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Mikulski, Barbara A. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Appropriations | No |
| 111 | Kohl, Herbert H. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Appropriations | No |
| 111 | Murray, Patty | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Appropriations | No |
| 111 | Dorgan, Byron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Appropriations | Announced retirement at end of Congress |
| 111 | Feinstein, Dianne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 11 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Appropriations | No |
| 111 | Durbin, Richard J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Johnson, Tim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Landrieu, Mary L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Reed, Jack | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 3 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Lautenberg, Frank R. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 14 | Inapplicable | 3 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Appropriations | No |
| 111 | Nelson, Earl Benjamin (Ben) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 15 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Appropriations | No |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 16 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | APPROPRIATIONS | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 17 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | APPROPRIATIONS | No |
| 111 | Cochran, Thad | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Appropriations | No |
| 111 | Specter, Arlen | Republican | 2009/1/21 | 2009/5/5 | Minority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Appropriations | Changed to the Democratic party; defeated in primaries |
| 111 | Bond, Christopher S. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Appropriations | Announced retirement at end of Congress |
| 111 | McConnell, Mitch | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Appropriations | No |
| 111 | Shelby, Richard C. | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Appropriations | No |
| 111 | Gregg, Judd | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Appropriations | Announced retirement at end of Congress |
| 111 | Bennett, Robert F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Appropriations | Defeated in primaries |
| 111 | Hutchison, Kay Bailey | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Appropriations | No |
| 111 | Brownback, Samuel Dale | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Appropriations | Elected Governor of KS, 2/10/10 |
| 111 | Alexander, Lamar | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Appropriations | No |
| 111 | Collins, Susan | Republican | 2009/5/5 | 2010/12/22 | | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES131 | Senate, 2nd Class | Appropriations | No |
| 111 | Voinovich, George Victor | Republican | 2009/5/5 | 2010/12/22 | | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES131 | Senate, 3rd Class | Appropriations | Announced retirement at end of Congress |
| 111 | Murkowski, Lisa | Republican | 2009/5/5 | 2010/12/22 | | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES131 | Senate, 3rd Class | Appropriations | No |
| 111 | Specter, Arlen | Democrat | 2009/5/5 | 2010/12/22 | | 18 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES130 | Senate, 3rd Class | Appropriations | Changed to the Democratic party; Defeated in primaries |
| 111 | Levin, Carl | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Armed Services | No |
| 111 | Kennedy, Edward M. | Democrat | 2009/1/21 | 2009/8/25 | Majority | 2 | Inapplicable | 27 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Armed Services | Died 8/25/2009 |
| 111 | Byrd, Robert C. | Democrat | 2009/1/21 | 2010/6/29 | Majority | 3 | Inapplicable | 21 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Armed Services | Died 6/29/10 |
| 111 | Lieberman, Joseph I. | Independent | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Armed Services | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 111 | Reed, Jack | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Armed Services | No |
| 111 | Akaka, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Armed Services | No |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Armed Services | No |
| 111 | Nelson, Earl Benjamin (Ben) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Armed Services | No |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Armed Services | Announced retirement at end of Congress |
| 111 | Webb, Jim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Armed Services | No |
| 111 | McCaskill, Claire | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Armed Services | No |
| 111 | Udall, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Armed Services | No |
| 111 | Hagan, Kay | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Armed Services | No |
| 111 | Begich, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 14 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Armed Services | No |
| 111 | Burris, Roland | Democrat | 2009/1/21 | 2010/11/29 | Majority | 15 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES18 | Senate, 3rd Class | Armed Services | Replaced Obama; resigned 11/29/10 |
| 111 | McCain, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Armed Services | No |
| 111 | Inhofe, James M. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Armed Services | No |
| 111 | Sessions, Jeff | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Armed Services | No |
| 111 | Chambliss, Saxby | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Armed Services | No |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Armed Services | No |
| 111 | Thune, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Armed Services | No |
| 111 | Martinez, Melquiades R. (Mel) | Republican | 2009/1/21 | 2009/9/9 | Minority | 7 | Inapplicable | 3 | Only period of service | | Inapplicable | SRES19 | Senate, 3rd Class | Armed Services | Resigned from the Senate |
| 111 | Wicker, Roger F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Armed Services | No |
| 111 | Burr, Richard | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Armed Services | No |
| 111 | Vitter, David | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Armed Services | No |
| 111 | Collins, Susan | Republican | 2009/1/21 | 2010/12/22 | Minority | 11 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Armed Services | No |
| 111 | Kirk, Paul | Democrat | 2009/9/29 | 2010/2/4 | | 1 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES290 | Senate, 1st Class | Armed Services | Appointed to replace Ted Kennedy, left office on 2/4/10 after successor sworn in |
| 111 | LeMieux, George | Republican | 2009/9/22 | 2010/12/22 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES279 | Senate, 3rd Class | Armed Services | Replaced Martinez; ranked after Wicker; Announced retirement at end of Congress |
| 111 | Dodd, Christopher, J | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Announced retirement at end of Congress |
| 111 | Johnson, Tim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Reed, Jack | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Announced retirement at end of Congress |
| 111 | Menendez, Robert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Akaka, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Brown, Sherrod | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Kohl, Herbert H. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Warner, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Merkley, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Bennett, Michael | Democrat | 2009/1/27 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S879 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Late appointment |
| 111 | Shelby, Richard C. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Bennett, Robert F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Defeated in primaries |
| 111 | Bunning, James Paul David | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Announced retirement at end of Congress |
| 111 | Crapo, Michael Dean | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Martinez, Melquiades R. (Mel) | Republican | 2009/1/21 | 2009/9/9 | Minority | 5 | Inapplicable | 5 | Only period of service | | Inapplicable | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Resigned from the Senate |
| 111 | Corker, Bob | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | DeMint, James W. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Vitter, David | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Johanns, Mike | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 111 | Hutchison, Kay Bailey | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 111 | Gregg, Judd | Republican | 2009/9/22 | 2010/12/22 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES279 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | Replaced Martinez; Announced Retirement at end of Congress |
| 111 | Conrad, Kent | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Murray, Patty | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Budget | No |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 14 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Budget | No |
| 111 | Feingold, Russel D. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Budget | Defeated for reelection |
| 111 | Byrd, Robert C. | Democrat | 2009/1/21 | 2010/6/29 | Majority | 5 | Inapplicable | 9 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Budget | Died 6/29/10 |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Stabenow, Deborah Ann | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Menendez, Robert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Cardin, Benjamin L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Sanders, Bernard | Independent | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Budget | No |
| 111 | Whitehouse, Sheldon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Budget | No |
| 111 | Warner, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Budget | No |
| 111 | Merkley, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Budget | No |
| 111 | Gregg, Judd | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Budget | Announced retirement at end of Congress |
| 111 | Grassley, Charles E. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Budget | No |
| 111 | Enzi, Michael B. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Budget | No |
| 111 | Sessions, Jeff | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Budget | No |
| 111 | Bunning, James Paul David | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Budget | Announced retirement at end of Congress |
| 111 | Crapo, Michael Dean | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Budget | No |
| 111 | Ensign, John Eric | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Budget | No |
| 111 | Cornyn, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Budget | No |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Budget | No |
| 111 | Alexander, Lamar | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Budget | No |
| 111 | Rockefeller, John D., IV | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Inouye, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 41 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Kerry, John F. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Dorgan, Byron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Commerce, Science, and Transportation | Announced retirement at end of Congress |
| 111 | Boxer, Barbara | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Cantwell, Maria | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Lautenberg, Frank R. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | McCaskill, Claire | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Klobuchar, Amy | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Udall, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Warner, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Begich, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 14 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | Hutchison, Kay Bailey | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Commerce, Science, and Transportation | Named ranking minority member 7/30/2008, SRES635 |
| 111 | Snowe, Olympia J. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 15 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Ensign, John Eric | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | DeMint, James W. | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Thune, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Wicker, Roger F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Vitter, David | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 111 | Brownback, Samuel Dale | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | Elected Governor of KS, 2/10/10 |
| 111 | Martinez, Melquiades R. (Mel) | Republican | 2009/1/21 | 2009/9/9 | Minority | 10 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES19 | Senate, 3rd Class | Commerce, Science, and Transportation | Resigned from the Senate |
| 111 | Johanns, Mike | Republican | 2009/1/21 | 2010/12/22 | Minority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 111 | LeMieux, George | Republican | 2009/9/22 | 2010/12/22 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES279 | Senate, 3rd Class | Commerce, Science, and Transportation | Ranked after Wicker; Announced retirement at end of Congress |
| 111 | Bingaman, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Dorgan, Byron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Energy and Natural Resources | Announced retirement at end of Congress |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Energy and Natural Resources | No |
| 111 | Johnson, Tim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | Landrieu, Mary L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | Cantwell, Maria | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Menendez, Robert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 3rd Class | Energy and Natural Resources | No |
| 111 | Lincoln, Blanche Lambert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Energy and Natural Resources | Defeated for reelection |
| 111 | Sanders, Bernard | Independent | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Energy and Natural Resources | Announced retirement at end of Congress |
| 111 | Stabenow, Deborah Ann | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Udall, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | Shaheen, Jeanne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 14 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | Murkowski, Lisa | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Energy and Natural Resources | No |
| 111 | Burr, Richard | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Energy and Natural Resources | No |
| 111 | Barrasso, John A. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Brownback, Samuel Dale | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Energy and Natural Resources | Elected Governor of KS, 2/10/10 |
| 111 | Risch, James | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | McCain, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Energy and Natural Resources | No |
| 111 | Bennett, Robert F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Energy and Natural Resources | Defeated in primaries |
| 111 | Bunning, James Paul David | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 7 | Second period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Energy and Natural Resources | Announced retirement at end of Congress |
| 111 | Sessions, Jeff | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Energy and Natural Resources | No |
| 111 | Corker, Bob | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Energy and Natural Resources | No |
| 111 | Boxer, Barbara | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Environment and Public Works | No |
| 111 | Baucus, Max | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Environment and Public Works | No |
| 111 | Carper, Thomas Richard | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Environment and Public Works | No |
| 111 | Lautenberg, Frank R. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 5 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Environment and Public Works | No |
| 111 | Cardin, Benjamin L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Environment and Public Works | No |
| 111 | Sanders, Bernard | Independent | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Environment and Public Works | No |
| 111 | Klobuchar, Amy | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Environment and Public Works | No |
| 111 | Whitehouse, Sheldon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Environment and Public Works | No |
| 111 | Udall, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | ENVIRONMENT AND PUBLIC WORKS | No |
| 111 | Merkley, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | ENVIRONMENT AND PUBLIC WORKS | No |
| 111 | Gillibrand, Kirsten E. | Democrat | 2009/1/27 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S880 | Senate, 1st Class | ENVIRONMENT AND PUBLIC WORKS | Late appointment |
| 111 | Inhofe, James M. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Environment and Public Works | No |
| 111 | Voinovich, George Victor | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Environment and Public Works | Announced retirement at end of Congress |
| 111 | Vitter, David | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Environment and Public Works | No |
| 111 | Barrasso, John A. | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Environment and Public Works | No |
| 111 | Specter, Arlen | Republican | 2009/1/21 | 2009/5/5 | Minority | 5 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Environment and Public Works | Changed to Democratic party; defeated in primaries |
| 111 | Crapo, Michael Dean | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Environment and Public Works | No |
| 111 | Bond, Christopher S. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Environment and Public Works | Announced retirement at end of Congress |
| 111 | Alexander, Lamar | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Environment and Public Works | No |
| 111 | Specter, Arlen | Democrat | 2009/5/5 | 2010/12/22 | | 12 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES130 | Senate, 3rd Class | ENVIRONMENT AND PUBLIC WORKS | Changed to Democratic party; Defeated in primaries |
| 111 | Baucus, Max | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Finance | No |
| 111 | Rockefeller, John D., IV | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Finance | No |
| 111 | Bingaman, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Conrad, Kent | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Kerry, John F. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 8 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Finance | No |
| 111 | Lincoln, Blanche Lambert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Finance | Defeated for reelection |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Finance | No |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Finance | No |
| 111 | Stabenow, Deborah Ann | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Cantwell, Maria | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Salazar, Kenneth Lee | Democrat | 2009/1/21 | 2009/1/20 | Majority | 10 | Inapplicable | 3 | Only period of service | | Inapplicable | SRES18 | Senate, 3rd Class | Finance | Resigned 1/20/2009, Appointed U.S. Secretary of the Interior |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Menendez, Robert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Carper, Thomas Richard | Democrat | 2009/1/21 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Finance | No |
| 111 | Grassley, Charles E. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 19 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Finance | No |
| 111 | Hatch, Orrin G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Finance | No |
| 111 | Snowe, Olympia J. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Finance | No |
| 111 | Kyl, Jon | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Finance | No |
| 111 | Bunning, James Paul David | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Finance | Announced retirement at end of Congress |
| 111 | Crapo, Michael Dean | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Finance | No |
| 111 | Roberts, Pat | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Finance | No |
| 111 | Ensign, John Eric | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Finance | No |
| 111 | Enzi, Michael B. | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Finance | No |
| 111 | Cornyn, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Finance | No |
| 111 | Kerry, John F. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Foreign Relations | No |
| 111 | Dodd, Christopher, J | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Foreign Relations | Announced retirement at end of Congress |
| 111 | Feingold, Russel D. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Foreign Relations | Defeated for reelection |
| 111 | Boxer, Barbara | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Foreign Relations | No |
| 111 | Menendez, Robert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Foreign Relations | No |
| 111 | Cardin, Benjamin L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Foreign Relations | No |
| 111 | Casey, Robert P., Jr. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Foreign Relations | No |
| 111 | Webb, Jim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Foreign Relations | No |
| 111 | Shaheen, Jeanne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Foreign Relations | No |
| 111 | Kaufman, Ted | Democrat | 2009/1/21 | 2009/11/15 | Majority | 10 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES18 | Senate, 2nd Class | Foreign Relations | Appointed to replace Biden, left office on 11/15/09 after successor sworn in |
| 111 | Gillibrand, Kirsten E. | Democrat | 2009/1/27 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S880 | Senate, 1st Class | Foreign Relations | Late appointment |
| 111 | Lugar, Richard G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Corker, Bob | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Risch, James | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | DeMint, James W. | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Barrasso, John A. | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Wicker, Roger F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Foreign Relations | Ranking reflects SRES218 |
| 111 | Inhofe, James M. | Republican | 2009/7/21 | 2010/12/22 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES218 | Senate, 2nd Class | Foreign Relations | Late appointment; ranking reflects SRES218 |
| 111 | Lieberman, Joseph I. | Independent | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Homeland Security and Governmental Affairs | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 111 | Levin, Carl | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 111 | Akaka, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 111 | Carper, Thomas Richard | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 111 | Landrieu, Mary L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 111 | McCaskill, Claire | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 111 | Burris, Roland | Democrat | 2009/1/21 | 2010/11/29 | Majority | 9 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES18 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Replaced Obama; resigned 11/29/10 |
| 111 | Bennett, Michael | Democrat | 2009/1/27 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | S880 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Late appointment |
| 111 | Collins, Susan | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218 |
| 111 | Coburn, Thomas Allen | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218 |
| 111 | McCain, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218 |
| 111 | Voinovich, George Victor | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218; Announced retirement at end of Congress |
| 111 | Ensign, John Eric | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218 |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Homeland Security and Governmental Affairs | Ranking reflects SRES218 |
| 111 | Bennett, Robert F. | Republican | 2009/7/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | | Remained until adjournment/assignments | Inapplicable | SRES218 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Late appointment; defeated in primaries |
| 111 | Kirk, Paul | Democrat | 2009/9/29 | 2010/2/4 | | 1 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES290 | Senate, 1st Class | Homeland Security and Governmental Affairs | Appointed to replace Ted Kennedy, left office on 2/4/10 after successor sworn in |
| 111 | Leahy, Patrick J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Judiciary | No |
| 111 | Kohl, Herbert H. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Judiciary | No |
| 111 | Feinstein, Dianne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Judiciary | No |
| 111 | Feingold, Russel D. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Judiciary | Defeated for reelection |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Judiciary | No |
| 111 | Durbin, Richard J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Judiciary | No |
| 111 | Cardin, Benjamin L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Judiciary | No |
| 111 | Whitehouse, Sheldon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Judiciary | No |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 3rd Class | JUDICIARY | SRES208 ranks Klobuchar, Kaufman, Wyden |
| 111 | Klobuchar, Amy | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | JUDICIARY | SRES208 ranks Klobuchar, Kaufman, Wyden |
| 111 | Kaufman, Ted | Democrat | 2009/1/21 | 2009/11/15 | Majority | 11 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES18 | Senate, 2nd Class | JUDICIARY | SRES208 ranks Klobuchar, Kaufman, Wyden; Appointed to replace Biden, left office on 11/15/09 after successor sworn in |
| 111 | Specter, Arlen | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:1st ranking minority member | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Judiciary | Changed to Democratic party; Defeated in primaries |
| 111 | Hatch, Orrin G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 33 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Judiciary | No |
| 111 | Grassley, Charles E. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Judiciary | No |
| 111 | Kyl, Jon | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Judiciary | No |
| 111 | Sessions, Jeff | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Ranking Minority Members:2nd ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Judiciary | Became ranking member 5/5/2009 |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Judiciary | No |
| 111 | Cornyn, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Judiciary | No |
| 111 | Coburn, Thomas Allen | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Judiciary | No |
| 111 | Specter, Arlen | Democrat | 2009/5/5 | 2010/12/22 | | 12 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES130 | Senate, 3rd Class | Judiciary | Changed to Democratic party; Defeated in primaries |
| 111 | Franken, Al | Democrat | 2009/7/7 | 2010/12/22 | | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES208 | Senate, 2nd Class | Judiciary | No |
| 111 | Kennedy, Edward M. | Democrat | 2009/1/21 | 2009/8/25 | Majority | 1 | Committee Chairmen:1st Chairman | 46 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Health, Education, Labor, and Pensions | Died 8/25/2009 |
| 111 | Dodd, Christopher, J | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 25 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Health, Education, Labor, and Pensions | Announced retirement at end of Congress |
| 111 | Harkin, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Committee Chairmen:2nd Chairman | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Health, Education, Labor, and Pensions | Appointed chair 9/9/2009 |
| 111 | Mikulski, Barbara A. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Bingaman, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 13 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 111 | Murray, Patty | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Reed, Jack | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Sanders, Bernard | Independent | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 111 | Brown, Sherrod | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 111 | Casey, Robert P., Jr. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 111 | Hagan, Kay | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Merkley, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 12 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Franken, Al | Democrat | 2009/9/9 | 2010/12/22 | Majority | 13 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES257 | Senate, 2nd Class | Health, Education, Labor, and Pensions | Late appointment |
| 111 | Enzi, Michael B. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Gregg, Judd | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | Announced retirement at end of Congress |
| 111 | Alexander, Lamar | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Burr, Richard | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | McCain, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Hatch, Orrin G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 5 | Second period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 111 | Murkowski, Lisa | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Coburn, Thomas Allen | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 111 | Roberts, Pat | Republican | 2009/1/21 | 2010/12/22 | Minority | 10 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 111 | Bennett, Michael | Democrat | 2009/9/29 | 2010/12/22 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES290 | Senate, 3rd Class | Health, Education, Labor, and Pensions | Replaced Kennedy |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 11 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Feinstein, Dianne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Dodd, Christopher, J | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner; Announced retirement at end of Congress |
| 111 | Byrd, Robert C. | Democrat | 2009/1/21 | 2010/6/29 | Majority | 4 | Inapplicable | 47 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner; Died 6/29/10 |
| 111 | Inouye, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 27 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Durbin, Richard J. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Nelson, Earl Benjamin (Ben) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Murray, Patty | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Warner, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Udall, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Rules and Administration | Rank given in SRES343: Schumer, Byrd, Inouye, Dodd, Feinstein, Durbin, Nelson (Nebraska), Murray, Pryor, Udall (NM), Warner |
| 111 | Bennett, Robert F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Rules and Administration | Defeated in primaries |
| 111 | McConnell, Mitch | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Rules and Administration | No |
| 111 | Cochran, Thad | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Rules and Administration | No |
| 111 | Chambliss, Saxby | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Rules and Administration | No |
| 111 | Hutchison, Kay Bailey | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Rules and Administration | No |
| 111 | Alexander, Lamar | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Rules and Administration | No |
| 111 | Roberts, Pat | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Rules and Administration | No |
| 111 | Ensign, John Eric | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Rules and Administration | No |
| 111 | Landrieu, Mary L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Kerry, John F. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 24 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Levin, Carl | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Harkin, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 24 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Lieberman, Joseph I. | Independent | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Small Business and Entrepreneurship | Lieberman caucused with the Democrats, so is classified with the majority party members. |
| 111 | Cantwell, Maria | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Small Business and Entrepreneurship | Announced retirement at end of Congress |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Cardin, Benjamin L. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 111 | Hagan, Kay | Democrat | 2009/1/21 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Shaheen, Jeanne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 111 | Snowe, Olympia J. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Bond, Christopher S. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Small Business and Entrepreneurship | Ranking reflects SRES218; Announced retirement at end of Congress |
| 111 | Vitter, David | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Thune, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Enzi, Michael B. | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Wicker, Roger F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Small Business and Entrepreneurship | Ranking reflects SRES218 |
| 111 | Risch, James | Republican | 2009/7/21 | 2010/12/22 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES218 | Senate, 2nd Class | Small Business and Entrepreneurship | Late appointment |
| 111 | Akaka, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Rockefeller, John D., IV | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 25 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Veterans' Affairs | No |
| 111 | Murray, Patty | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Veterans' Affairs | No |
| 111 | Sanders, Bernard | Independent | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Brown, Sherrod | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Webb, Jim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Begich, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | VETERANS' AFFAIRS | No |
| 111 | Burris, Roland | Democrat | 2009/1/21 | 2010/11/29 | Majority | 9 | Inapplicable | 1 | Only period of service | | Inapplicable | SRES18 | Senate, 3rd Class | VETERANS' AFFAIRS | Replaced Obama; resigned 11/29/10 |
| 111 | Burr, Richard | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Veterans' Affairs | No |
| 111 | Specter, Arlen | Democrat | 2009/1/21 | 2009/5/5 | Minority | 2 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Veterans' Affairs | Changed to Democratic party; Defeated in primaries |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Veterans' Affairs | No |
| 111 | Wicker, Roger F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 2 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Veterans' Affairs | No |
| 111 | Johanns, Mike | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Veterans' Affairs | No |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Veterans' Affairs | No |
| 111 | Specter, Arlen | Democrat | 2009/5/5 | 2010/12/22 | | 10 | Inapplicable | 29 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES130 | Senate, 3rd Class | Veterans' Affairs | Changed to Democratic party; Defeated in primaries |
| 111 | Kohl, Herbert H. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 21 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Aging (Special Committee) | No |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 14 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Aging (Special Committee) | No |
| 111 | Lincoln, Blanche Lambert | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Aging (Special Committee) | Defeated for reelection |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Aging (Special Committee) | Announced retirement at end of Congress |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Aging (Special Committee) | No |
| 111 | Casey, Robert P., Jr. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Aging (Special Committee) | No |
| 111 | McCaskill, Claire | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Aging (Special Committee) | No |
| 111 | Whitehouse, Sheldon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Aging (Special Committee) | No |
| 111 | Udall, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Aging (Special Committee) | Late appointee |
| 111 | Bennett, Michael | Democrat | 2009/1/27 | 2010/12/22 | Majority | 10 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S880 | Senate, 3rd Class | Aging (Special Committee) | Late appointee |
| 111 | Gillibrand, Kirsten E. | Democrat | 2009/1/27 | 2010/12/22 | Majority | 11 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | S880 | Senate, 1st Class | Aging (Special Committee) | Late appointee |
| 111 | Martinez, Melquiades R. (Mel) | Republican | 2009/1/21 | 2009/9/9 | Minority | 1 | Ranking Minority Members:1st ranking minority member | 5 | Only period of service | | Inapplicable | SRES19 | Senate, 3rd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; resigned from the Senate |
| 111 | Shelby, Richard C. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Collins, Susan | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Specter, Arlen | Republican | 2009/1/21 | 2009/5/5 | Minority | 4 | Inapplicable | 3 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Aging (Special Committee) | Changed to Democratic party; defeated in primaries |
| 111 | Chambliss, Saxby | Republican | 2009/7/21 | 2010/12/22 | Minority | 5 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES218 | Senate, 2nd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Corker, Bob | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Ranking Minority Members:2nd ranking minority member | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Hatch, Orrin G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Brownback, Samuel Dale | Republican | 2009/1/21 | 2010/12/22 | Minority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss; Elected Governor of KS, 2/10/10 |
| 111 | Graham, Lindsey O. | Republican | 2009/1/21 | 2010/12/22 | Minority | 9 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Aging (Special Committee) | SRES218 has ranking: Martinez, Shelby, Collins, Corker, Hatch, Brownback, Graham, Chambliss; SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss |
| 111 | Specter, Arlen | Democrat | 2009/5/5 | 2010/12/22 | | 12 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Inapplicable | SRES130 | Senate, 3rd Class | Aging (Special Committee) | Late appointee; Defeated in primaries |
| 111 | LeMieux, George | Republican | 2009/9/22 | 2010/12/22 | | 1 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES279 | Senate, 3rd Class | Aging (Special Committee) | SRES279 has ranking: Corker, Shelby, Collins, Hatch, LeMieux, Brownback, Graham, Chambliss; Announced retirement at end of Congress |
| 111 | Feinstein, Dianne | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 111 | Rockefeller, John D., IV | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 111 | Wyden, Ron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 111 | Bayh, Evan | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Intelligence (Select Committee) | Announced retirement at end of Congress |
| 111 | Mikulski, Barbara A. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 111 | Feingold, Russel D. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Intelligence (Select Committee) | Defeated for reelection |
| 111 | Nelson, Clarence William (Bill) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 111 | Whitehouse, Sheldon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 111 | Bond, Christopher S. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 7 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Intelligence (Select Committee) | Announced retirement at end of Congress |
| 111 | Hatch, Orrin G. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 111 | Snowe, Olympia J. | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 111 | Chambliss, Saxby | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 111 | Burr, Richard | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 111 | Risch, James | Republican | 2009/1/21 | 2010/12/22 | Minority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 111 | Boxer, Barbara | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Ethics (Select Committee) | No |
| 111 | Pryor, Mark | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 111 | Brown, Sherrod | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Ethics (Select Committee) | No |
| 111 | Isakson, Johnny | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Ethics (Select Committee) | No |
| 111 | Roberts, Pat | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 111 | Risch, James | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 111 | Dorgan, Byron | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES18 | Senate, 3rd Class | Indian Affairs (Select Committee) | Announced retirement at end of Congress |
| 111 | Inouye, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 2 | Inapplicable | 31 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 111 | Conrad, Kent | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 15 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 111 | Akaka, Daniel K. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 19 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 111 | Johnson, Tim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 111 | Cantwell, Maria | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 111 | Tester, Jon | Democrat | 2009/1/21 | 2010/12/22 | Majority | 7 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 111 | Udall, Tom | Democrat | 2009/1/21 | 2010/12/22 | Majority | 8 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 111 | Barrasso, John A. | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Ranking Minority Members:Only ranking minority member | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 111 | McCain, John | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 23 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 111 | Murkowski, Lisa | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 111 | Coburn, Thomas Allen | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 111 | Crapo, Michael Dean | Republican | 2009/1/21 | 2010/12/22 | Minority | 5 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 111 | Johanns, Mike | Republican | 2009/1/21 | 2010/12/22 | Minority | 6 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/4/3 | 2010/12/22 | Majority | 1 | Non-standing committee senior party status:Only Vice Chairman | 9 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 3rd Class | Library (Joint) | No |
| 111 | Dodd, Christopher, J | Democrat | 2009/4/3 | 2010/12/22 | Majority | 2 | Inapplicable | 11 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES102 | Senate, 3rd Class | Library (Joint) | Announced retirement at end of Congress |
| 111 | Durbin, Richard J. | Democrat | 2009/4/3 | 2010/12/22 | Majority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 2nd Class | Library (Joint) | No |
| 111 | Bennett, Robert F. | Republican | 2009/4/3 | 2010/12/22 | Minority | 1 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES102 | Senate, 3rd Class | Library (Joint) | Defeated in primaries |
| 111 | Cochran, Thad | Republican | 2009/4/3 | 2010/12/22 | Minority | 2 | Inapplicable | 1 | Third period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 2nd Class | Library (Joint) | No |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/4/3 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 3rd Class | Printing (Joint) | No |
| 111 | Murray, Patty | Democrat | 2009/4/3 | 2010/12/22 | Majority | 2 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 3rd Class | Printing (Joint) | No |
| 111 | Udall, Tom | Democrat | 2009/4/3 | 2010/12/22 | Majority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 2nd Class | Printing (Joint) | No |
| 111 | Bennett, Robert F. | Republican | 2009/4/3 | 2010/12/22 | Minority | 1 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES102 | Senate, 3rd Class | Printing (Joint) | No |
| 111 | Chambliss, Saxby | Republican | 2009/4/3 | 2010/12/22 | Minority | 2 | Inapplicable | 7 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES102 | Senate, 2nd Class | Printing (Joint) | No |
| 111 | Baucus, Max | Democrat | 2009/2/25 | 2010/12/22 | Majority | 1 | Committee Chairmen:Only Chairman | NA | NA | Remained until adjournment/assignments | Continues on committee (or successor) | S2500 | Senate, 2nd Class | Taxation (Joint) | No |
| 111 | Rockefeller, John D., IV | Democrat | 2009/2/25 | 2010/12/22 | Majority | 2 | Inapplicable | NA | NA | Remained until adjournment/assignments | Continues on committee (or successor) | S2500 | Senate, 2nd Class | Taxation (Joint) | No |
| 111 | Conrad, Kent | Democrat | 2009/2/25 | 2010/12/22 | Majority | 3 | Inapplicable | NA | NA | Remained until adjournment/assignments | Continues on committee (or successor) | S2500 | Senate, 1st Class | Taxation (Joint) | No |
| 111 | Grassley, Charles E. | Republican | 2009/2/25 | 2010/12/22 | Minority | 1 | Inapplicable | NA | NA | Remained until adjournment/assignments | Continues on committee (or successor) | S2500 | Senate, 3rd Class | Taxation (Joint) | No |
| 111 | Hatch, Orrin G. | Republican | 2009/2/25 | 2010/12/22 | Minority | 2 | Inapplicable | NA | NA | Remained until adjournment/assignments | Continues on committee (or successor) | S2500 | Senate, 1st Class | Taxation (Joint) | No |
| 111 | Schumer, Charles Ellis (Chuck) | Democrat | 2009/1/21 | 2010/12/22 | Majority | 1 | Non-standing committee senior party status:Only Vice Chairman | 3 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES18 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 111 | Kennedy, Edward M. | Democrat | 2009/1/21 | 2009/8/25 | Majority | 2 | Inapplicable | 35 | Only period of service | | Inapplicable | SRES18 | Senate, 1st Class | Economic (Joint Committee) | Died 8/25/2009 |
| 111 | Bingaman, Jeff | Democrat | 2009/1/21 | 2010/12/22 | Majority | 3 | Inapplicable | 23 | First period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Economic (Joint Committee) | No |
| 111 | Klobuchar, Amy | Democrat | 2009/1/21 | 2010/12/22 | Majority | 4 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Economic (Joint Committee) | No |
| 111 | Casey, Robert P., Jr. | Democrat | 2009/1/21 | 2010/12/22 | Majority | 5 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Economic (Joint Committee) | No |
| 111 | Webb, Jim | Democrat | 2009/1/21 | 2010/12/22 | Majority | 6 | Inapplicable | 3 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES18 | Senate, 1st Class | Economic (Joint Committee) | No |
| 111 | Brownback, Samuel Dale | Republican | 2009/1/21 | 2010/12/22 | Minority | 1 | Inapplicable | 13 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Economic (Joint Committee) | Elected Governor of KS, 2/10/10 |
| 111 | DeMint, James W. | Republican | 2009/1/21 | 2010/12/22 | Minority | 2 | Inapplicable | 5 | Only period of service | Remained until adjournment/assignments | Continues on committee (or successor) | SRES19 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 111 | Risch, James | Republican | 2009/1/21 | 2010/12/22 | Minority | 3 | Inapplicable | 1 | Only period of service | Remained until adjournment/assignments | Continues in congress, but not committee | SRES19 | Senate, 2nd Class | Economic (Joint Committee) | No |
| 111 | Bennett, Robert F. | Republican | 2009/1/21 | 2010/12/22 | Minority | 4 | Inapplicable | 17 | Only period of service | Remained until adjournment/assignments | Inapplicable | SRES19 | Senate, 3rd Class | Economic (Joint Committee) | Defeated in primaries |
| 111 | Durbin, Richard J. | Democrat | 2009/1/6 | 2010/12/22 | Majority | 1 | Majority Leadership:Only Majority Whip | 3 | Only period of service | NA | NA | NA | Senate, 2nd Class | Majority whip | No |
| 111 | Reid, Harry | Democrat | 2009/1/6 | 2010/12/22 | Majority | 1 | Majority Leadership:Only Majority Leader | 3 | Only period of service | NA | NA | NA | Senate, 3rd Class | Majority leader | No |
| 111 | Kyl, Jon | Republican | 2009/1/6 | 2010/12/22 | Minority | 1 | Minority Leadership:1st Minority Whip | 3 | Only period of service | NA | NA | NA | Senate, 1st Class | Minority whip | No |
| 111 | McConnell, Mitch | Republican | 2009/1/6 | 2010/12/22 | Minority | 1 | Minority Leadership:Only Minority Leader | 3 | Only period of service | NA | NA | NA | Senate, 2nd Class | Minority leader | No |
| 112 | Stabenow, Deborah Ann | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Leahy, Patrick J. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 37 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Harkin, Tom | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 26 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Conrad, Kent | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 25 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Baucus, Max | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 23 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Nelson, Earl Benjamin (Ben) | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Brown, Sherrod | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Casey, Robert P., Jr. | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Klobuchar, Amy | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Bennett, Michael | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Gillibrand, Kirsten E. | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Roberts, Pat | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Lugar, Richard G. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 35 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Cochran, Thad | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 33 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | McConnell, Mitch | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 26 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Chambliss, Saxby | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Johanns, Mike | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Boozman, John | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Grassley, Charles E. | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 9 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Thune, John | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Hoeven, John | Democrat | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Agriculture, Nutrition, and Forestry | No |
| 112 | Inouye, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 41 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Appropriations | No |
| 112 | Leahy, Patrick J. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 34 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Appropriations | No |
| 112 | Harkin, Tom | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 26 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Mikulski, Barbara A. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 25 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Appropriations | No |
| 112 | Kohl, Herbert H. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Appropriations | No |
| 112 | Murray, Patty | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Appropriations | No |
| 112 | Feinstein, Dianne | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 13 | Second period of service | NA | NA | SRES42 | Senate, 1st Class | Appropriations | No |
| 112 | Durbin, Richard J. | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 13 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Johnson, Tim | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Landrieu, Mary L. | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Reed, Jack | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 5 | Third period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Lautenberg, Frank R. | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 5 | Third period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Nelson, Earl Benjamin (Ben) | Democrat | 2011/2/2 | NA | Majority | 13 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Appropriations | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 14 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Appropriations | No |
| 112 | Tester, Jon | Democrat | 2011/2/2 | NA | Majority | 15 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Appropriations | No |
| 112 | Brown, Sherrod | Democrat | 2011/2/2 | NA | Majority | 16 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Appropriations | No |
| 112 | Cochran, Thad | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 31 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Appropriations | No |
| 112 | McConnell, Mitch | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 19 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Appropriations | No |
| 112 | Shelby, Richard C. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 17 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Hutchison, Kay Bailey | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Appropriations | No |
| 112 | Alexander, Lamar | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Appropriations | No |
| 112 | Collins, Susan | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Appropriations | No |
| 112 | Murkowski, Lisa | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Graham, Lindsey O. | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Appropriations | No |
| 112 | Kirk, Mark | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Coats, Dan | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Blunt, Roy | Republican | 2011/2/2 | NA | Minority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Moran, Jerry | Republican | 2011/2/2 | NA | Minority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Hoeven, John | Republican | 2011/2/2 | NA | Minority | 13 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Johnson, Ron | Republican | 2011/2/2 | NA | Minority | 14 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Appropriations | No |
| 112 | Levin, Carl | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 33 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Lieberman, Joseph I. | Independent | 2011/2/2 | NA | Majority | 2 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Reed, Jack | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 13 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Akaka, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Nelson, Earl Benjamin (Ben) | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Webb, Jim | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | McCaskill, Claire | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Udall, Mark | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Hagan, Kay | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Begich, Mark | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Manchin, Joe | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Shaheen, Jeanne | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Armed Services | No |
| 112 | Gillibrand, Kirsten E. | Democrat | 2011/2/2 | NA | Majority | 13 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Armed Services | No |
| 112 | Blumenthal, Richard | Democrat | 2011/2/2 | NA | Majority | 14 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Armed Services | No |
| 112 | McCain, John | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 25 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Armed Services | No |
| 112 | Inhofe, James M. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 17 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Armed Services | No |
| 112 | Sessions, Jeff | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 13 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Armed Services | No |
| 112 | Chambliss, Saxby | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Armed Services | No |
| 112 | Wicker, Roger F. | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 4 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Armed Services | No |
| 112 | Brown, Scott | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Armed Services | No |
| 112 | Portman, Rob | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Armed Services | No |
| 112 | Ayotte, Kelly | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Armed Services | No |
| 112 | Collins, Susan | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 11 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Armed Services | No |
| 112 | Graham, Lindsey O. | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Armed Services | No |
| 112 | Cornyn, John | Republican | 2011/2/2 | NA | Minority | 11 | Inapplicable | 1 | Second period of service | NA | NA | SRES43 | Senate, 1st Class | Armed Services | No |
| 112 | Vitter, David | Republican | 2011/2/2 | NA | Minority | 12 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Armed Services | No |
| 112 | Johnson, Tim | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Reed, Jack | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 13 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Menendez, Robert | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Akaka, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Second period of service | NA | NA | SRES42 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Brown, Sherrod | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Tester, Jon | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Kohl, Herbert H. | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Merkley, Jeff | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Bennett, Michael | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Hagan, Kay | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Shelby, Richard C. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 25 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Crapo, Michael Dean | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 13 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Corker, Bob | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 4 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | DeMint, James W. | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Vitter, David | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Johanns, Mike | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Toomey, Patrick J. | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Kirk, Mark | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Moran, Jerry | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Banking, Housing, and Urban Affairs | No |
| 112 | Wicker, Roger F. | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Banking, Housing, and Urban Affairs | No |
| 112 | Conrad, Kent | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 25 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Budget | No |
| 112 | Murray, Patty | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Budget | No |
| 112 | Wyden, Ron | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 16 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Budget | No |
| 112 | Nelson, Clarence William (Bill) | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Budget | No |
| 112 | Stabenow, Deborah Ann | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Budget | No |
| 112 | Cardin, Benjamin L. | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Budget | No |
| 112 | Sanders, Bernard | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Budget | No |
| 112 | Whitehouse, Sheldon | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Budget | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Budget | No |
| 112 | Merkley, Jeff | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Budget | No |
| 112 | Begich, Mark | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Budget | No |
| 112 | Coons, Christopher | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Budget | No |
| 112 | Sessions, Jeff | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Budget | No |
| 112 | Grassley, Charles E. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 31 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Enzi, Michael B. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Budget | No |
| 112 | Crapo, Michael Dean | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Ensign, John Eric | Republican | 2011/2/2 | 2011/5/1 | Minority | 5 | Inapplicable | 9 | Only period of service | | Inapplicable | SRES43 | Senate, 1st Class | Budget | Resigned 5/2/11 due to ethics violation |
| 112 | Cornyn, John | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Budget | No |
| 112 | Graham, Lindsey O. | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Budget | No |
| 112 | Thune, John | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Portman, Rob | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Toomey, Patrick J. | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Johnson, Ron | Republican | 2011/2/2 | NA | Minority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Budget | No |
| 112 | Ayotte, Kelly | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 3rd Class | Budget | Replaced Ensign |
| 112 | Rockefeller, John D., IV | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 26 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Inouye, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 43 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Kerry, John F. | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 25 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Boxer, Barbara | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Nelson, Clarence William (Bill) | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Cantwell, Maria | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 9 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Lautenberg, Frank R. | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 9 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | McCaskill, Claire | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Klobuchar, Amy | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Udall, Tom | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Begich, Mark | Democrat | 2011/2/2 | NA | Majority | 13 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Commerce, Science, and Transportation | No |
| 112 | Hutchison, Kay Bailey | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 19 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Snowe, Olympia J. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 17 | Second period of service | NA | NA | SRES43 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Ensign, John Eric | Republican | 2011/2/2 | 2011/5/1 | Minority | 3 | Inapplicable | 11 | Only period of service | | Inapplicable | SRES43 | Senate, 1st Class | Commerce, Science, and Transportation | Resigned 5/2/11 due to ethics violation |
| 112 | DeMint, James W. | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Thune, John | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Wicker, Roger F. | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 4 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Commerce, Science, and Transportation | No |
| 112 | Isakson, Johnny | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Blunt, Roy | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Boozman, John | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Toomey, Patrick J. | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Rubio, Marco | Republican | 2011/2/2 | NA | Minority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Ayotte, Kelly | Republican | 2011/2/2 | NA | Minority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Commerce, Science, and Transportation | No |
| 112 | Heller, Dean | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 1st Class | Commerce, Science, and Transportation | Replaced Ensign |
| 112 | Bingaman, Jeff | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 26 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Wyden, Ron | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Johnson, Tim | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Landrieu, Mary L. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Cantwell, Maria | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Sanders, Bernard | Independent | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Stabenow, Deborah Ann | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Udall, Mark | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Shaheen, Jeanne | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Franken, Al | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Manchin, Joe | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Coons, Christopher | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Murkowski, Lisa | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 9 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Burr, Richard | Republican | 2011/2/2 | 2011/5/10 | Minority | 2 | Inapplicable | 7 | Only period of service | | Continues in congress, but not committee | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Barrasso, John A. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Risch, James | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Energy and Natural Resources | No |
| 112 | Lee, Mike | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Paul, Rand | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Coats, Dan | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Portman, Rob | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Hoeven, John | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Energy and Natural Resources | No |
| 112 | Corker, Bob | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Energy and Natural Resources | No |
| 112 | Heller, Dean | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 1st Class | Energy and Natural Resources | Replaced Burr; In this order: Ms. Murkowski, Mr. Barrasso, Mr. Risch, Mr. Lee, Mr. Paul, Mr. Coats, Mr. Portman, Mr. Hoeven, Mr. Heller and Mr. Corker |
| 112 | Boxer, Barbara | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 19 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Environment and Public Works | No |
| 112 | Baucus, Max | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 33 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Carper, Thomas Richard | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Environment and Public Works | No |
| 112 | Lautenberg, Frank R. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 7 | Second period of service | NA | NA | SRES42 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Cardin, Benjamin L. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Environment and Public Works | No |
| 112 | Sanders, Bernard | Independent | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Environment and Public Works | No |
| 112 | Whitehouse, Sheldon | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Environment and Public Works | No |
| 112 | Udall, Tom | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Merkley, Jeff | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Gillibrand, Kirsten E. | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Environment and Public Works | No |
| 112 | Inhofe, James M. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 17 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Vitter, David | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Environment and Public Works | No |
| 112 | Barrasso, John A. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Environment and Public Works | No |
| 112 | Sessions, Jeff | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Second period of service | NA | NA | SRES43 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Crapo, Michael Dean | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 3 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Environment and Public Works | No |
| 112 | Alexander, Lamar | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Johanns, Mike | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Environment and Public Works | No |
| 112 | Boozman, John | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Environment and Public Works | No |
| 112 | Baucus, Max | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 33 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Finance | No |
| 112 | Rockefeller, John D., IV | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 25 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Finance | No |
| 112 | Conrad, Kent | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Bingaman, Jeff | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Kerry, John F. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 10 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Finance | No |
| 112 | Wyden, Ron | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Finance | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Finance | No |
| 112 | Stabenow, Deborah Ann | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Cantwell, Maria | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Nelson, Clarence William (Bill) | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Menendez, Robert | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 3 | NA | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Carper, Thomas Richard | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Cardin, Benjamin L. | Democrat | 2011/2/2 | NA | Majority | 13 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Finance | No |
| 112 | Hatch, Orrin G. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 21 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Finance | No |
| 112 | Grassley, Charles E. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 21 | Second period of service | NA | NA | SRES43 | Senate, 3rd Class | Finance | No |
| 112 | Snowe, Olympia J. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 11 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Finance | No |
| 112 | Kyl, Jon | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Finance | No |
| 112 | Crapo, Michael Dean | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Finance | No |
| 112 | Roberts, Pat | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Finance | No |
| 112 | Ensign, John Eric | Republican | 2011/2/2 | 2011/5/1 | Minority | 7 | Inapplicable | 5 | Only period of service | | Inapplicable | SRES43 | Senate, 1st Class | Finance | Resigned 5/2/11 due to ethics violation |
| 112 | Cornyn, John | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Finance | No |
| 112 | Coburn, Thomas Allen | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Finance | No |
| 112 | Thune, John | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Finance | No |
| 112 | Burr, Richard | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 3rd Class | Finance | Replaced Ensign |
| 112 | Kerry, John F. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 26 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Boxer, Barbara | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 13 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Foreign Relations | No |
| 112 | Menendez, Robert | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Foreign Relations | No |
| 112 | Cardin, Benjamin L. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Foreign Relations | No |
| 112 | Casey, Robert P., Jr. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Foreign Relations | No |
| 112 | Webb, Jim | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Foreign Relations | No |
| 112 | Shaheen, Jeanne | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Coons, Christopher | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Durbin, Richard J. | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Udall, Tom | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Lugar, Richard G. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 33 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Foreign Relations | No |
| 112 | Corker, Bob | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Foreign Relations | No |
| 112 | Risch, James | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Foreign Relations | No |
| 112 | Rubio, Marco | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Foreign Relations | No |
| 112 | Inhofe, James M. | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Foreign Relations | No |
| 112 | DeMint, James W. | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Foreign Relations | No |
| 112 | Isakson, Johnny | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Foreign Relations | No |
| 112 | Barrasso, John A. | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 4 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Foreign Relations | No |
| 112 | Lee, Mike | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Foreign Relations | No |
| 112 | Lieberman, Joseph I. | Independent | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 23 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | Levin, Carl | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 33 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | Akaka, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 21 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | Carper, Thomas Richard | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 9 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | Landrieu, Mary L. | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | McCaskill, Claire | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | Tester, Jon | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | Begich, Mark | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | Collins, Susan | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | Coburn, Thomas Allen | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 112 | Brown, Scott | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Homeland Security and Governmental Affairs | No |
| 112 | McCain, John | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 112 | Johnson, Tim | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Homeland Security and Governmental Affairs | No |
| 112 | Ensign, John Eric | Republican | 2011/2/2 | 2011/5/1 | Minority | 6 | Inapplicable | 3 | Only period of service | | Inapplicable | SRES43 | Senate, 1st Class | Homeland Security and Governmental Affairs | Resigned 5/2/11 due to ethics violation |
| 112 | Portman, Rob | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 112 | Paul, Rand | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Homeland Security and Governmental Affairs | No |
| 112 | Moran, Jerry | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 3rd Class | Homeland Security and Governmental Affairs | Replaced Ensign |
| 112 | Leahy, Patrick J. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 33 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Judiciary | No |
| 112 | Kohl, Herbert H. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 23 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Judiciary | No |
| 112 | Feinstein, Dianne | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Judiciary | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 13 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Judiciary | No |
| 112 | Durbin, Richard J. | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Second period of service | NA | NA | SRES42 | Senate, 2nd Class | Judiciary | No |
| 112 | Whitehouse, Sheldon | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Judiciary | No |
| 112 | Klobuchar, Amy | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Judiciary | No |
| 112 | Franken, Al | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Judiciary | No |
| 112 | Coons, Christopher | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Judiciary | No |
| 112 | Blumenthal, Richard | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Judiciary | No |
| 112 | Grassley, Charles E. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 31 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Judiciary | No |
| 112 | Hatch, Orrin G. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 35 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Judiciary | No |
| 112 | Kyl, Jon | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 17 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Judiciary | No |
| 112 | Sessions, Jeff | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Judiciary | No |
| 112 | Graham, Lindsey O. | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Judiciary | No |
| 112 | Cornyn, John | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Judiciary | No |
| 112 | Lee, Mike | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Judiciary | No |
| 112 | Coburn, Thomas Allen | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Judiciary | No |
| 112 | Harkin, Tom | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 25 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Mikulski, Barbara A. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 25 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Bingaman, Jeff | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 15 | Second period of service | NA | NA | SRES42 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 112 | Murray, Patty | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 15 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Sanders, Bernard | Independent | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 112 | Casey, Robert P., Jr. | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 112 | Hagan, Kay | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Merkley, Jeff | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Franken, Al | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Bennett, Michael | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Whitehouse, Sheldon | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Blumenthal, Richard | Democrat | 2011/2/2 | NA | Majority | 12 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Enzi, Michael B. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Alexander, Lamar | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Burr, Richard | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Isakson, Johnny | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Paul, Rand | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Hatch, Orrin G. | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 7 | Second period of service | NA | NA | SRES43 | Senate, 1st Class | Health, Education, Labor, and Pensions | No |
| 112 | McCain, John | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Roberts, Pat | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 11 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Health, Education, Labor, and Pensions | No |
| 112 | Murkowski, Lisa | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Kirk, Mark | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Health, Education, Labor, and Pensions | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 13 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Inouye, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 29 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Feinstein, Dianne | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 19 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Rules and Administration | No |
| 112 | Durbin, Richard J. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Nelson, Earl Benjamin (Ben) | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Rules and Administration | No |
| 112 | Murray, Patty | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Udall, Tom | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Leahy, Patrick J. | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Alexander, Lamar | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Rules and Administration | No |
| 112 | McConnell, Mitch | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 23 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Cochran, Thad | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 19 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Chambliss, Saxby | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Hutchison, Kay Bailey | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Rules and Administration | No |
| 112 | Roberts, Pat | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Rules and Administration | No |
| 112 | Shelby, Richard C. | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Blunt, Roy | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Rules and Administration | No |
| 112 | Landrieu, Mary L. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 15 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Levin, Carl | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 33 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Harkin, Tom | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 26 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Kerry, John F. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 26 | NA | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Lieberman, Joseph I. | Independent | 2011/2/2 | NA | Majority | 5 | Inapplicable | 23 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 112 | Cantwell, Maria | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 9 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Cardin, Benjamin L. | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 112 | Shaheen, Jeanne | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Hagan, Kay | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Snowe, Olympia J. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 17 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 112 | Vitter, David | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 112 | Risch, James | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Rubio, Marco | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 112 | Paul, Rand | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 112 | Ayotte, Kelly | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 112 | Enzi, Michael B. | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Small Business and Entrepreneurship | No |
| 112 | Brown, Scott | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Small Business and Entrepreneurship | No |
| 112 | Moran, Jerry | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Small Business and Entrepreneurship | No |
| 112 | Murray, Patty | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 17 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Veterans' Affairs | No |
| 112 | Rockefeller, John D., IV | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 27 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Veterans' Affairs | No |
| 112 | Akaka, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 21 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Sanders, Bernard | Independent | 2011/2/2 | NA | Majority | 4 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Brown, Sherrod | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Webb, Jim | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Tester, Jon | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Begich, Mark | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Veterans' Affairs | No |
| 112 | Burr, Richard | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Veterans' Affairs | No |
| 112 | Isakson, Johnny | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Veterans' Affairs | No |
| 112 | Wicker, Roger F. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 4 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Johanns, Mike | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Veterans' Affairs | No |
| 112 | Brown, Scott | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Veterans' Affairs | No |
| 112 | Moran, Jerry | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Veterans' Affairs | No |
| 112 | Boozman, John | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Veterans' Affairs | No |
| 112 | Kohl, Herbert H. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 23 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Wyden, Ron | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 16 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Nelson, Clarence William (Bill) | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Casey, Robert P., Jr. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | McCaskill, Claire | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Whitehouse, Sheldon | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Udall, Mark | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Aging (Special Committee) | No |
| 112 | Bennett, Michael | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Gillibrand, Kirsten E. | Democrat | 2011/2/2 | NA | Majority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Manchin, Joe | Democrat | 2011/2/2 | NA | Majority | 10 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Blumenthal, Richard | Democrat | 2011/2/2 | NA | Majority | 11 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Corker, Bob | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Collins, Susan | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Aging (Special Committee) | No |
| 112 | Hatch, Orrin G. | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 3 | Third period of service | NA | NA | SRES43 | Senate, 1st Class | Aging (Special Committee) | No |
| 112 | Kirk, Mark | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Moran, Jerry | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 1 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Johnson, Ron | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 1 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Ayotte, Kelly | Republican | 2011/2/2 | 2011/5/10 | Minority | 7 | Inapplicable | 1 | Third period of service | | Continues in congress, but not committee | SRES43 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Shelby, Richard C. | Republican | 2011/2/2 | NA | Minority | 8 | Inapplicable | 25 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Aging (Special Committee) | No |
| 112 | Graham, Lindsey O. | Republican | 2011/2/2 | NA | Minority | 9 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Aging (Special Committee) | No |
| 112 | Chambliss, Saxby | Republican | 2011/2/2 | NA | Minority | 10 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Aging (Special Committee) | No |
| 112 | Heller, Dean | Republican | 2011/5/10 | NA | | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES179 | Senate, 1st Class | Aging (Special Committee) | Replaced Ayotte; In this order: Mr. Corker, Ms. Collins, Mr. Hatch, Mr. Kirk, Mr. Heller, Mr. Moran, Mr. Johnson (Wisconsin), Mr. Shelby, Mr. Graham, and Mr. Chambliss |
| 112 | Feinstein, Dianne | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 112 | Rockefeller, John D., IV | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 112 | Wyden, Ron | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Mikulski, Barbara A. | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Nelson, Clarence William (Bill) | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 112 | Conrad, Kent | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 112 | Udall, Mark | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 112 | Chambliss, Saxby | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 9 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 112 | Snowe, Olympia J. | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Intelligence (Select Committee) | No |
| 112 | Burr, Richard | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Risch, James | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Intelligence (Select Committee) | No |
| 112 | Coats, Dan | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Blunt, Roy | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Rubio, Marco | Republican | 2011/2/2 | NA | Minority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Intelligence (Select Committee) | No |
| 112 | Boxer, Barbara | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 5 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Ethics (Select Committee) | No |
| 112 | Pryor, Mark | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 7 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 112 | Brown, Sherrod | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Ethics (Select Committee) | No |
| 112 | Isakson, Johnny | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Ethics (Select Committee) | No |
| 112 | Roberts, Pat | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 15 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 112 | Risch, James | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Ethics (Select Committee) | No |
| 112 | Akaka, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 21 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 112 | Inouye, Daniel K. | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 33 | Only period of service | NA | NA | SRES42 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 112 | Conrad, Kent | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 17 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 112 | Johnson, Tim | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 112 | Cantwell, Maria | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 11 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 112 | Tester, Jon | Democrat | 2011/2/2 | NA | Majority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 112 | Udall, Tom | Democrat | 2011/2/2 | NA | Majority | 7 | Inapplicable | 3 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 112 | Franken, Al | Democrat | 2011/2/2 | NA | Majority | 8 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 112 | Barrasso, John A. | Republican | 2011/2/2 | NA | Minority | 1 | Ranking Minority Members:Only ranking minority member | 5 | Only period of service | NA | NA | SRES43 | Senate, 1st Class | Indian Affairs (Select Committee) | No |
| 112 | McCain, John | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 25 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 112 | Murkowski, Lisa | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 9 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 112 | Hoeven, John | Democrat | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 112 | Crapo, Michael Dean | Republican | 2011/2/2 | NA | Minority | 5 | Inapplicable | 3 | Third period of service | NA | NA | SRES43 | Senate, 3rd Class | Indian Affairs (Select Committee) | No |
| 112 | Johanns, Mike | Republican | 2011/2/2 | NA | Minority | 6 | Inapplicable | 3 | Only period of service | NA | NA | SRES43 | Senate, 2nd Class | Indian Affairs (Select Committee) | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/3/15 | NA | Majority | 1 | Non-standing committee senior party status:Only Vice Chairman | 11 | Only period of service | NA | NA | SRES103 | Senate, 3rd Class | Library (Joint) | No |
| 112 | Durbin, Richard J. | Democrat | 2011/3/15 | NA | Majority | 2 | Inapplicable | 3 | Only period of service | NA | NA | SRES103 | Senate, 2nd Class | Library (Joint) | No |
| 112 | Leahy, Patrick J. | Democrat | 2011/3/15 | NA | Majority | 3 | Inapplicable | 1 | Only period of service | NA | NA | SRES103 | Senate, 3rd Class | Library (Joint) | No |
| 112 | Alexander, Lamar | Republican | 2011/3/15 | NA | Minority | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES103 | Senate, 2nd Class | Library (Joint) | No |
| 112 | Cochran, Thad | Republican | 2011/3/15 | NA | Minority | 2 | Inapplicable | 3 | Third period of service | NA | NA | SRES103 | Senate, 2nd Class | Library (Joint) | No |
| 112 | Schumer, Charles Ellis (Chuck) | Democrat | 2011/3/15 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 3 | Only period of service | NA | NA | SRES103 | Senate, 3rd Class | Printing (Joint) | No |
| 112 | Murray, Patty | Democrat | 2011/3/15 | NA | Majority | 2 | Inapplicable | 5 | Only period of service | NA | NA | SRES103 | Senate, 3rd Class | Printing (Joint) | No |
| 112 | Udall, Tom | Democrat | 2011/3/15 | NA | Majority | 3 | Inapplicable | 3 | Only period of service | NA | NA | SRES103 | Senate, 2nd Class | Printing (Joint) | No |
| 112 | Alexander, Lamar | Republican | 2011/3/15 | NA | Minority | 1 | Inapplicable | 1 | Only period of service | NA | NA | SRES103 | Senate, 2nd Class | Printing (Joint) | No |
| 112 | Chambliss, Saxby | Republican | 2011/3/15 | NA | Minority | 2 | Inapplicable | 9 | Only period of service | NA | NA | SRES103 | Senate, 2nd Class | Printing (Joint) | No |
| 112 | Baucus, Max | Democrat | 2011/2/15 | NA | Majority | 1 | Non-standing committee senior party status:Only Vice Chairman | NA | NA | NA | NA | S804 | Senate, 2nd Class | Taxation (Joint) | No |
| 112 | Rockefeller, John D., IV | Democrat | 2011/2/15 | NA | Majority | 2 | Inapplicable | NA | NA | NA | NA | S804 | Senate, 2nd Class | Taxation (Joint) | No |
| 112 | Conrad, Kent | Democrat | 2011/2/15 | NA | Majority | 3 | Inapplicable | NA | NA | NA | NA | S804 | Senate, 1st Class | Taxation (Joint) | No |
| 112 | Hatch, Orrin G. | Republican | 2011/2/15 | NA | Minority | 1 | Inapplicable | NA | NA | NA | NA | S804 | Senate, 1st Class | Taxation (Joint) | No |
| 112 | Grassley, Charles E. | Republican | 2011/2/15 | NA | Minority | 2 | Inapplicable | NA | NA | NA | NA | S804 | Senate, 3rd Class | Taxation (Joint) | No |
| 112 | Casey, Robert P., Jr. | Democrat | 2011/2/2 | NA | Majority | 1 | Committee Chairmen:Only Chairman | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Economic (Joint Committee) | No |
| 112 | Bingaman, Jeff | Democrat | 2011/2/2 | NA | Majority | 2 | Inapplicable | 25 | First period of service | NA | NA | SRES42 | Senate, 1st Class | Economic (Joint Committee) | No |
| 112 | Klobuchar, Amy | Democrat | 2011/2/2 | NA | Majority | 3 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Economic (Joint Committee) | No |
| 112 | Webb, Jim | Democrat | 2011/2/2 | NA | Majority | 4 | Inapplicable | 5 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Economic (Joint Committee) | No |
| 112 | Warner, Mark | Democrat | 2011/2/2 | NA | Majority | 5 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 2nd Class | Economic (Joint Committee) | No |
| 112 | Sanders, Bernard | Independent | 2011/2/2 | NA | Majority | 6 | Inapplicable | 1 | Only period of service | NA | NA | SRES42 | Senate, 1st Class | Economic (Joint Committee) | No |
| 112 | DeMint, James W. | Republican | 2011/2/2 | NA | Minority | 1 | Inapplicable | 7 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 112 | Coats, Dan | Republican | 2011/2/2 | NA | Minority | 2 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 112 | Lee, Mike | Republican | 2011/2/2 | NA | Minority | 3 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 112 | Toomey, Patrick J. | Republican | 2011/2/2 | NA | Minority | 4 | Inapplicable | 1 | Only period of service | NA | NA | SRES43 | Senate, 3rd Class | Economic (Joint Committee) | No |
| 112 | Durbin, Richard J. | Democrat | 2011/1/3 | NA | Majority | 1 | Majority Leadership:Only Majority Whip | 4 | Only period of service | NA | NA | NA | Senate, 2nd Class | Majority whip | No |
| 112 | Reid, Harry | Democrat | 2011/1/3 | NA | Majority | 1 | Majority Leadership:Only Majority Leader | 4 | Only period of service | NA | NA | NA | Senate, 3rd Class | Majority leader | No |
| 112 | Kyl, Jon | Republican | 2011/1/3 | NA | Minority | 1 | Minority Leadership:1st Minority Whip | 4 | Only period of service | NA | NA | NA | Senate, 1st Class | Minority whip | No |
| 112 | McConnell, Mitch | Republican | 2011/1/3 | NA | Minority | 1 | Minority Leadership:Only Minority Leader | 4 | Only period of service | NA | NA | NA | Senate, 2nd Class | Minority leader | No |