# List of United States senators in the 33rd Congress

This is a complete list of members of the United States Senate during the 33rd United States Congress listed by seniority, from March 4, 1853, to March 3, 1855.
Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within his or her new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.
Senators who were sworn in during the middle of the Congress (up until the last senator who was not sworn in early after winning the November 1854 election) are listed at the end of the list with no number.

## Terms of service

| Class | Terms of service of senators that expired in years |
| Class 3 | Terms of service of senators that expired in 1855 (AL, AR, CA, CT, FL, GA, IA, IL, IN, KY, LA, MD, MO, NC, NH, NY, OH, PA, SC, VT, and WI.) |
| Class 1 | Terms of service of senators that expired in 1857 (CA, CT, DE, FL, IN, MA, MD, ME, MI, MN, MO, MS, NJ, NY, OH, PA, RI, TN, TX, VA, VT, and WI.) |
| Class 2 | Terms of service of senators that expired in 1859 (AL, AR, DE, GA, IA, IL, KY, LA, MA, ME, MI, MS, NC, NH, NJ, RI, SC, TN, TX, and VA.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Rank | Senator (party-state) | Seniority date | Other factors |
| 1 | James Alfred Pearce (D-MD) | March 4, 1843 | Former representative |
| 2 | David Rice Atchison (D-MO) | October 14, 1843 | |
| 3 | Jesse D. Bright (D-IN) | March 4, 1845 | Former lieutenant governor |
| 4 | Thomas Jefferson Rusk (D-TX) | February 21, 1846 | |
| 5 | Samuel Houston (D-TX) | February 26, 1846 | Former representative, former governor |
| 6 | George Edmund Badger (W-NC) | November 26, 1846 |
| 7 | Andrew Pickens Butler (D-SC) | December 4, 1846 | |
| 8 | James M. Mason (D-VA) | January 21, 1847 | Former representative |
| 9 | Stephen A. Douglas (D-IL) | March 4, 1847 | Former representative |
| 10 | Robert M. T. Hunter (D-VA) | March 4, 1847 | Former representative |
| 11 | John Bell (D-TN) | November 22, 1847 | Former representative |
| 12 | Solon Borland (D-AR) | March 30, 1848 | |
| 13 | William K. Sebastian (D-AR) | May 12, 1848 | |
| 14 | Henry Dodge (D-WI) | June 8, 1848 | Former delegate |
| 15 | Hannibal Hamlin (D-ME) | June 8, 1848 | Former representative |
| 16 | Isaac Pigeon Walker (D-WI) | June 8, 1848 | |
| 17 | Augustus Caesar Dodge (D-IA) | December 7, 1848 | Former delegate |
| 18 | George Wallace Jones (D-IA) | December 7, 1848 | Former delegate |
| 19 | William H. Seward (R-NY) | March 4, 1849 | Former governor |
| 20 | Lewis Cass (D-MI) | March 4, 1849 | |
| 21 | Truman Smith (D-CT) | March 4, 1849 | Former representative |
| 22 | Jackson Morton (W-FL) | March 4, 1849 | |
| 23 | Moses Norris, Jr. (D-NH) | March 4, 1849 | Former representative |
| 24 | Salmon P. Chase (R-OH) | March 4, 1849 | |
| 25 | Pierre Soulé (D-LA) | March 4, 1849 | |
| 26 | James Cooper (W-PA) | March 4, 1849 | |
| 27 | William Dawson (W-GA) | March 4, 1849 | Former representative |
| 28 | James Shields (D-IL) | October 27, 1849 | |
| 29 | Thomas Pratt (D-MD) | January 12, 1850 | |
| 30 | William M. Gwin (D-CA) | September 9, 1850 | Former representative |
| 31 | Solomon Foot (W-VT) | March 4, 1851 | |
| 32 | James A. Bayard Jr. (D-DE) | March 4, 1851 | |
| 33 | Stephen Mallory (D-FL) | March 4, 1851 | |
| 34 | Henry S. Geyer (W-MO) | March 4, 1851 | |
| 35 | Richard Brodhead (D-PA) | March 4, 1851 | |
| 36 | Charles T. James (D-RI) | March 4, 1851 | |
| 37 | James C. Jones (D-TN) | March 4, 1851 | |
| 38 | Benjamin Wade (R-OH) | March 15, 1851 | |
| 39 | Charles Sumner (LR-MA) | April 11, 1851 | |
| 40 | John M. Clayton (R-NY) | December 1, 1851 | |
| 41 | John B. Weller (LD-CA) | January 30, 1852 | |
| 42 | Stephen Adams (D-MS) | March 17, 1852 | |
| 43 | Isaac Toucey (D-CT) | May 12, 1852 | |
| 44 | Archibald Dixon (W-KY) | September 1, 1852 | |
| 45 | Samuel Shethar Phelps (W-VT) | January 17, 1853 | |
| 46 | John Pettit (D-IN) | January 18, 1853 | |
| 47 | John R. Thomson (D-NJ) | March 4, 1853 | |
| 48 | Robert Toombs (D-GA) | March 4, 1853 | Former representative |
| 49 | Judah P. Benjamin (D-LA) | March 4, 1853 | |
| 50 | Josiah J. Evans (D-SC) | March 4, 1853 | |
| 51 | Charles E. Stuart (D-MI) | March 4, 1853 | Former representative |
| 52 | John B. Thompson (KN-KY) | March 4, 1853 | Former representative |
| 53 | John Middleton Clayton (W-DE) | March 4, 1853 | |
| 54 | William Wright (D-NJ) | March 4, 1853 | |
| 55 | Edward Everett (W-MA) | March 4, 1853 | Former representative, former governor |
| 56 | Charles Gordon Atherton (D-NH) | March 4, 1853 | Former representative |
| | Robert Ward Johnson (D-AR) | July 6, 1853 | Former representative |
| | Philip Allen (D-RI) | July 20, 1853 | Former governor |
| | Clement Claiborne Clay (D-AL) | November 29, 1853 | |
| | Jared W. Williams (D-NH) | November 29, 1853 | Former representative, former governor |
| | John Slidell (D-LA) | December 5, 1853 | Former representative |
| | Albert G. Brown (D-MS) | January 7, 1854 | Former representative, former governor |
| | William P. Fessenden (R-ME) | February 10, 1854 | Former representative |
| | Francis Gillette (D-CT) | May 24, 1854 | |
| | Julius Rockwell (W-MA) | June 3, 1854 | Former representative |
| | Lawrence Brainerd (W-VT) | October 14, 1854 | |
| | David Settle Reid (D-NC) | December 6, 1854 | Former representative, former governor |
| | John S. Wells (D-NH) | January 16, 1855 | |
| | Henry Wilson (R-MA) | January 31, 1855 | |