Rank | Senator (party-state) | Seniority date | Other factors |
1 | Benjamin Ruggles (AJ-OH) | March 4, 1815 | |
2 | Nathaniel Macon (J-NC)[7] | December 5, 1815 |
3 | James Noble (AJ-IN) | December 11, 1816 |
4 | Mahlon Dickerson (J-NJ)[8] | March 4, 1817 |
5 | Thomas Hill Williams (J-MS) | December 10, 1817 |
6 | Jesse Burgess Thomas (AJ-IL) | November 23, 1818 |
7 | Richard Mentor Johnson (J-KY) | December 10, 1819 |
8 | William Rufus de Vane King (J-AL) | December 14, 1819 |
9 | John Chandler (J-ME) | June 14, 1820 |
10 | Nehemiah Rice Knight (AJ-RI) | January 9, 1821 |
11 | Martin Van Buren (J-NY)[9] | March 4, 1821 | New York 1st in population (1810) |
12 | Horatio Seymour (AJ-VT) | Vermont 15th in population (1810) |
13 | David Barton (AJ-MO) | August 10, 1821 | Alphabetical (Ba) |
14 | Thomas Hart Benton (J-MO) | Alphabetical (Be) |
15 | John Henry Eaton (J-TN) | September 27, 1821 |
16 | Samuel Smith (J-MD) | December 17, 1822 |
17 | John Branch (DR-NC) | March 4, 1823 | Former governor; North Carolina 4th in population (1820) |
18 | Samuel Bell (AJ-NH) | Former governor; New Hampshire 15th in population (1820) |
19 | Robert Young Hayne (J-NH) |
20 | Josiah Stoddard Johnston (AJ-LA) | January 15, 1824 |
21 | Charles Dominique Joseph Bouligny (AJ-LA) | November 19, 1824 |
22 | Thomas Willis Cobb (J-GA) | December 6, 1824 |
23 | Littleton Waller Tazewell (J-VA) | December 7, 1824 |
24 | Dudley Chase (AJ-VT) | March 4, 1825 | Former senator |
25 | William Hendricks (AJ-IN) | Former representative (5 years) |
26 | William Henry Harrison (AJ-OH)[10] | Former representative (3 years) |
27 | John Rowan (J-KY) | Former representative (2 years) |
28 | William Marks (AJ-PA) | Pennsylvania 2nd in population (1820) |
29 | John Macpherson Berrien (J-GA) | Georgia 11th in population (1820) |
30 | Elias Kent Kane (J-IL) | Illinois 24th in population (1820) |
31 | Levi Woodbury (J-NH) | March 16, 1825 |
32 | Calvin Willey (J-CT) | May 4, 1825 |
33 | Hugh Lawson White (J-TN) | October 28, 1825 |
34 | Ashur Robbins (AJ-RI) | October 31, 1825 |
35 | Nathan Sanford (AJ-NY) | January 14, 1826 |
36 | Ezekiel Forman Chambers (AJ-VA) | January 24, 1826 |
37 | Nathaniel Silsbee (AJ-MA) | May 31, 1826 |
38 | Ephraim Bateman (AJ-NJ)[11] | November 10, 1826 |
39 | John McKinley (J-AL) | November 27, 1826 |
40 | William Smith (DR-SC) | November 29, 1826 |
41 | Henry Moore Ridgely (J-DE) | January 12, 1827 |
42 | Powhatan Ellis (J-MS) | March 4, 1827 | Former senator |
43 | Louis McLane (J-DE) | Former representative (10 years) |
44 | John Tyler (J-VA) | Former representative (4 years, 2 months) |
45 | Samuel Augustus Foot (AJ-CT) | Former representative (4 years, 0 months) |
46 | Albion Keith Parris (J-ME)[12] | Former representative (2 years) |
47 | Isaac Dutton Barnard (J-PA) |
48 | Daniel Webster (AJ-MA) | June 8, 1827 |
| Oliver Hillhouse Prince (J-GA) | November 7, 1828 |
| Jacob Burnet (AJ-OH) | December 10, 1828 |
| James Iredell Jr. (J-NC) | December 15, 1828 |
| John Holmes (DR-ME) | January 15, 1829 | Former representative |
| Charles Edward Dudley (J-NY) |