# List of United States senators in the 17th Congress

This is a complete list of members of the United States Senate during the 17th United States Congress listed by seniority, from March 4, 1821, to March 3, 1823.
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 2 | Terms of service of senators that expired in 1823 (AL, DE, GA, IL, KY, LA, MA, ME, MS, NC, NH, NJ, RI, SC, TN, and VA.) |
| Class 3 | Terms of service of senators that expired in 1825 (AL, CT, DE, IN, MA, MD, ME, MO, MS, NH, NJ, NY, OH, PA, RI, SC, and VT.) |
| Class 1 | Terms of service of senators that expired in 1827 (CT, GA, IL, IN, KY, LA, MD, MO, NC, NY, OH, PA, TN, VA, and VT.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Rank | Senator (party-state) | Seniority date | Other factors |
| 1 | John Gaillard (DR-SC) | December 6, 1804 | |
| 2 | Rufus King (F-NY) | March 4, 1813 |
| 3 | James Barbour (DR-VA) | January 2, 1815 |
| 4 | Benjamin Ruggles (DR-OH) | March 4, 1815 |
| 5 | John Williams (DR-TN) | October 10, 1815 |
| 6 | Nathaniel Macon (DR-NC) | December 5, 1815 |
| 7 | Montfort Stokes (DR-NC) | December 4, 1816 | North Carolina 4th in population (1810) |
| 8 | William Smith (DR-SC) | December 4, 1816 | South Carolina 6th in population (1810) |
| 9 | James Noble (DR-IN) | December 11, 1816 | Alphabetical (N) |
| 10 | Waller Taylor (DR-IN) | December 11, 1816 | Alphabetical (T) |
| 11 | Harrison Gray Otis (F-MA) | March 4, 1817 | Former representative (4 years) |
| 12 | Nicholas Van Dyke (F-DE) | March 4, 1817 | Former representative (3 years) |
| 13 | Mahlon Dickerson (DR-NJ) | March 4, 1817 | Former governor |
| 14 | David Lawrence Morril (DR-NH) | March 4, 1817 | |
| 15 | Thomas Hill Williams (DR-MS) | December 10, 1817 |
| 16 | Henry Johnson (DR-LA) | January 12, 1818 |
| 17 | William Adams Palmer (DR-VT) | October 20, 1818 |
| 18 | Jesse Burgess Thomas (DR-IL) | December 3, 1818 | Former delegate |
| 19 | Ninian Edwards (DR-IL) | December 3, 1818 | |
| 20 | James Brown (DR-LA) | March 4, 1819 | Former senator |
| 21 | Edward Lloyd (DR-MD) | March 4, 1819 | Former representative (2 years, 3 months) |
| 22 | John Fabyan Parrott (DR-NH) | March 4, 1819 | Former representative (2 years, 0 months) |
| 23 | Walter Lowrie (DR-PA) | March 4, 1819 | Pennsylvania 3rd in population (1810) |
| 24 | James Lanman (DR-CT) | March 4, 1819 | Connecticut 9th in population (1810) |
| 25 | John Elliott (DR-GA) | March 4, 1819 | Georgia 11th in population (1810) |
| 26 | William Allen Trimble (DR-OH) | March 4, 1819 | Ohio 13th in population (1810) |
| 27 | Freeman Walker (DR-GA) | November 6, 1819 |
| 28 | Richard Mentor Johnson (DR-KY) | December 10, 1819 |
| 29 | James Pleasants (DR-VA) | December 14, 1819 | Former representative (8 years) |
| 30 | William Rufus de Vane King (DR-AL) | December 14, 1819 | Former representative (5 years) |
| 31 | John Williams Walker (DR-AL) | December 14, 1819 |
| 32 | William Pinkney (F-MD) | December 21, 1819 |
| 33 | Elijah Hunt Mills (DR-MA) | June 12, 1820 |
| 34 | John Holmes (DR-ME) | June 13, 1820 |
| 35 | John Chandler (DR-ME) | June 14, 1820 |
| 36 | David Holmes (DR-MS) | August 30, 1820 |
| 37 | Isham Talbot (DR-KY) | October 19, 1820 |
| 38 | Nehemiah Rice Knight (DR-RI) | January 9, 1821 |
| 39 | Samuel Lewis Southard (DR-NJ) | January 26, 1821 |
| 40 | Martin Van Buren (DR-NY) | March 4, 1821 | New York 1st in population (1810) |
| 41 | Elijah Boardman (DR-CT) | March 4, 1821 | Connecticut 9th in population (1810) |
| 42 | Horatio Seymour (DR-VT) | March 4, 1821 | Vermont 15th in population (1810) |
| 43 | James De Wolf (DR-RI) | March 4, 1821 | Rhode Island 17th in population (1810) |
| 44 | David Barton (DR-MO) | August 10, 1821 | Alphabetical (Ba) |
| 45 | Thomas Hart Benton (DR-MO) | August 10, 1821 | Alphabetical (Be) |
| 46 | John Henry Eaton (DR-TN) | September 27, 1821 |
| 47 | Nicholas Ware (DR-GA) | November 10, 1821 |
| 48 | William Findlay (DR-PA) | December 10, 1821 |
| 49 | Ethan Allen Brown (DR-OH) | January 3, 1822 |
| 50 | Caesar Augustus Rodney (DR-DE) | January 24, 1822 |
| 51 | James Lloyd (F-MA) | June 5, 1822 |
| 52 | William Kelly (DR-AL) | December 12, 1822 |
| 53 | Samuel Smith (DR-MD) | December 17, 1822 |
| 54 | John Taylor of Caroline (DR-VA) | December 18, 1822 | Former senator |