# List of United States senators in the 12th Congress

This is a complete list of members of the United States Senate during the 12th United States Congress listed by seniority, from March 4, 1811, to March 3, 1813.
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.
The two main parties at this point were the Federalists (F), and Democratic Republicans (DR)

## Terms of service

| Class | Terms of service of senators that expired in years |
| Class 3 | Terms of service of senators that expired in 1813 (CT, GA, KY, LA, MD, NC, NH, NY, OH, PA, SC, and VT.) |
| Class 1 | Terms of service of senators that expired in 1815 (CT, DE, MA, MD, NJ, NY, OH, PA, RI, TN, VA, and VT.) |
| Class 2 | Terms of service of senators that expired in 1817 (DE, GA, KY, LA, MA, NC, NH, NJ, RI, SC, TN, and VA.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Rank | Senator (party-state) | Seniority date | Other factors |
| 1 | Joseph Inslee Anderson (DR-TN) | September 26, 1797 | |
| 2 | Stephen Row Bradley (DR-VT) | October 15, 1801 |
| 3 | Samuel Smith (DR-MD) | March 4, 1803 |
| 4 | John Smith (DR-NY) | February 23, 1804 |
| 5 | William Branch Giles (DR-VA) | August 11, 1804 |
| 6 | James Asheton Bayard, Sr. (F-DE) | November 13, 1804 |
| 7 | John Gaillard (DR-SC) | December 6, 1804 |
| 8 | Nicholas Gilman (DR-NH) | March 4, 1805 | Former representative (8 years) |
| 9 | James Turner (DR-NC) | March 4, 1805 |
| 10 | Philip Reed (DR-KY) | November 25, 1806 |
| 11 | Jesse Franklin (DR-NC) | March 4, 1807 | Former senator |
| 12 | Andrew Gregg (DR-PA) | March 4, 1807 | Former representative |
| 13 | John Pope (DR-KY) | March 4, 1807 |
| 14 | Jonathan Robinson (DR-VT) | October 10, 1807 |
| 15 | Chauncey Goodrich (F-CT) | October 25, 1807 |
| 16 | William Harris Crawford (DR-GA) | November 7, 1807 |
| 17 | James Lloyd (F-MA) | June 9, 1808 |
| 18 | Michael Leib (DR-PA) | January 9, 1809 |
| 19 | Richard Brent (DR-VA) | March 4, 1809 | Former representative (6 years) |
| 20 | John Lambert (DR-NJ) | March 4, 1809 | Former representative (4 years); New Jersey 10th in population (1800) |
| 21 | Obadiah German (DR-NY) | March 4, 1809 |
| 22 | John Condit (DR-NJ) | March 4, 1809 | March 21, 1809 |
| 23 | Jenkin Whiteside (DR-TN) | April 11, 1809 |
| 24 | Christopher Grant Champlin (F-RI) | June 26, 1809 |
| 25 | Charles Tait (DR-GA) | November 27, 1809 |
| 26 | Alexander Campbell (DR-OH) | December 11, 1809 |
| 27 | Outerbridge Horsey (F-DE) | January 12, 1810 |
| 28 | Charles Cutts (DR-NH) | June 21, 1810 |
| 29 | Samuel Whittlesey Dana (F-CT) | December 4, 1810 |
| 30 | Thomas Worthington (DR-OH) | December 15, 1810 |
| 31 | John Taylor (DR-SC) | December 31, 1810 |
| 32 | George Mortimer Bibb (DR-KY) | March 4, 1811 | Kentucky 9th in population (1800) |
| 33 | Jeremiah Brown Howell (DR-RI) | March 4, 1811 | Rhode Island 15th in population (1800) |
| 34 | Joseph Bradley Varnum (DR-MA) | June 29, 1811 |
| 35 | George Washington Campbell (DR-TN) | October 8, 1811 | Former representative |
| 36 | William Hunter (F-RI) | October 28, 1811 |
| 37 | Allan Bowie Magruder (DR-LA) | September 3, 1812 |
| 38 | Jean Noel Destréhan (DR-LA) | September 3, 1812 | |
| 39 | Thomas Posey (DR-LA) | October 8, 1812 |
| 40 | James Brown (DR-LA) | February 5, 1813 |