# List of United States senators in the 19th Congress

This is a complete list of members of the United States Senate during the 19th United States Congress listed by seniority, from March 4, 1825, to March 3, 1827.
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 two-year congressional term (up until the last senator who was not sworn in early after winning the November 1826 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 1 | Terms of service of senators that expired in 1827 (CT, DE, IN, MA, MD, ME, MO, MS, NJ, NY, OH, PA, RI, TN, VA, and VT.) |
| Class 2 | Terms of service of senators that expired in 1829 (AL, DE, GA, IL, KY, LA, MA, ME, MS, NC, NH, NJ, RI, SC, and VA.) |
| Class 3 | Terms of service of senators that expired in 1831 (AL, CT, GA, IL, IN, KY, LA, MD, MO, NC, NH, NY, OH, PA, SC, TN, and VT.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Rank | Senator (party-state) | Seniority date | Other factors |
| 1 | John Gaillard (J-SC) | December 6, 1804 | |
| 2 | James Barbour (DR-VA) | January 2, 1815 |
| 3 | Benjamin Ruggles (AJ-OH) | March 4, 1815 |
| 4 | Nathaniel Macon (J-NC) | December 5, 1815 |
| 5 | James Noble (AJ-IN) | December 11, 1816 |
| 6 | Nicholas Van Dyke (AJ-DE) | March 4, 1817 | Former representative |
| 7 | Mahlon Dickerson (J-NJ) | March 4, 1817 |
| 8 | Thomas Hill Williams (J-MS) | December 10, 1817 |
| 9 | Jesse Burgess Thomas (AJ-IL) | December 3, 1818 |
| 10 | Edward Lloyd (J-MD) | March 4, 1819 |
| 11 | Richard Mentor Johnson (J-KY) | December 10, 1819 |
| 12 | William Rufus de Vane King (J-AL) | December 14, 1819 |
| 13 | Elijah Hunt Mills (AJ-MA) | June 12, 1820 |
| 14 | John Holmes (DR-ME) | June 13, 1820 |
| 15 | John Chandler (J-ME) | June 14, 1820 |
| 16 | David Holmes (J-MS) | August 30, 1820 |
| 17 | Nehemiah Rice Knight (AJ-RI) | January 9, 1821 |
| 18 | Martin Van Buren (J-NY) | March 4, 1821 | New York 1st in population (1810) |
| 19 | Horatio Seymour (AJ-VT) | March 4, 1821 | Vermont 15th in population (1810) |
| 20 | James De Wolf (DR-RI) | March 4, 1821 | Rhode Island 17th in population (1810) |
| 21 | David Barton (AJ-MO) | August 10, 1821 | Alphabetical (Ba) |
| 22 | Thomas Hart Benton (J-MO) | August 10, 1821 | Alphabetical (Be) |
| 23 | John Henry Eaton (J-TN) | September 27, 1821 |
| 24 | William Findlay (J-PA) | December 10, 1821 |
| 25 | James Lloyd (AJ-MA) | June 5, 1822 |
| 26 | Samuel Smith (J-MD) | December 17, 1822 |
| 27 | Andrew Jackson (J-TN) | March 4, 1823 | Former senator |
| 28 | John Branch (DR-NC) | March 4, 1823 | Former governor; North Carolina 4th in population (1820) |
| 29 | Samuel Bell (AJ-NH) | March 4, 1823 | Former governor; New Hampshire 15th in population (1820) |
| 30 | Robert Young Hayne (J-NH) | March 4, 1823 |
| 31 | Henry Waggaman Edwards (J-CT) | October 8, 1823 |
| 32 | Joseph McIlvaine (AJ-NJ) | November 12, 1823 |
| 33 | Thomas Clayton (AJ-DE) | January 8, 1824 |
| 34 | Josiah Stoddard Johnston (AJ-LA) | January 15, 1824 |
| 35 | Charles Dominique Joseph Bouligny (AJ-LA) | November 19, 1824 |
| 36 | Thomas Willis Cobb (DR-GA) | December 6, 1824 |
| 37 | Littleton Waller Tazewell (J-VA) | December 7, 1824 |
| 38 | Dudley Chase (AJ-VT) | March 4, 1825 | Former senator |
| 39 | William Hendricks (AJ-IN) | March 4, 1825 | Former representative (5 years) |
| 40 | William Henry Harrison (AJ-OH) | March 4, 1825 | Former representative (3 years) |
| 41 | John Rowan (J-KY) | March 4, 1825 | Former representative (2 years) |
| 42 | William Marks (AJ-PA) | March 4, 1825 | Pennsylvania 2nd in population (1820) |
| 43 | John Macpherson Berrien (J-GA) | March 4, 1825 | Georgia 11th in population (1820) |
| 44 | Henry H. Chambers (J-AL) | March 4, 1825 | Alabama 19th in population (1820) |
| 45 | Elias Kent Kane (J-IL) | March 4, 1825 | Illinois 24th in population (1820) |
| 46 | Levi Woodbury (J-NH) | March 16, 1825 |
| 47 | Calvin Willey (J-CT) | May 4, 1825 |
| | Powhatan Ellis (J-MS) | September 28, 1825 |
| | Hugh Lawson White (J-TN) | October 28, 1825 |
| | Ashur Robbins (AJ-RI) | October 31, 1825 |
| | John Randolph (J-VA) | December 26, 1825 |
| 48 | Nathan Sanford (AJ-NY) | January 14, 1826 |
| | Ezekiel Forman Chambers (AJ-VA) | January 24, 1826 |
| | Thomas Buck Reed (J-MS) | January 28, 1826 |
| | Israel Pickens (J-AL) | February 17, 1826 |
| | William Harper (J-SC) | March 8, 1826 |
| | Nathaniel Silsbee (AJ-MA) | May 31, 1826 |
| | Daniel Rodney (AJ-DE) | May 31, 1826 |
| | Ephraim Bateman (AJ-NJ) | November 10, 1826 |
| | John McKinley (J-AL) | November 27, 1826 |
| | William Smith (DR-SC) | November 29, 1826 |
| | Henry Moore Ridgely (J-DE) | January 12, 1827 |