Rank | Senator (party-state) | Seniority date | Other factors |
1 | Benjamin Ruggles (AJ-OH) | March 4, 1815 | |
2 | James Noble (AJ-IN)[6] | December 11, 1816 |
3 | Mahlon Dickerson (J-NJ) | March 4, 1817 |
4 | William Rufus de Vane King (J-AL) | December 14, 1819 |
5 | Nehemiah Rice Knight (AJ-RI) | January 9, 1821 |
6 | Horatio Seymour (AJ-VT) | March 4, 1821 | Vermont 15th in population (1810) |
7 | David Barton (AJ-MO) | August 10, 1821 | Alphabetical (Ba) |
8 | Thomas Hart Benton (J-MO) | Alphabetical (Be) |
9 | John Henry Eaton (J-TN)[7] | September 27, 1821 |
10 | Samuel Smith (J-MD) | December 17, 1822 |
11 | Samuel Bell (AJ-NH) | March 4, 1823 | Former governor; New Hampshire 15th in population (1820) |
12 | Robert Young Hayne (J-NH) |
13 | Josiah Stoddard Johnston (AJ-LA) | January 15, 1824 |
14 | Littleton Waller Tazewell (J-VA) | December 7, 1824 |
15 | Dudley Chase (AJ-VT) | March 4, 1825 | Former senator |
16 | William Hendricks (AJ-IN) | Former representative (5 years) |
17 | John Rowan (J-KY) | Former representative (2 years) |
18 | William Marks (AJ-PA) | Pennsylvania 2nd in population (1820) |
19 | John Macpherson Berrien (J-GA)[8] | Georgia 11th in population (1820) |
20 | Elias Kent Kane (J-IL) | Illinois 24th in population (1820) |
21 | Levi Woodbury (J-NH) | March 16, 1825 |
22 | Calvin Willey (AJ-CT) | May 4, 1825 |
23 | Hugh Lawson White (J-TN) | October 28, 1825 |
24 | Ashur Robbins (AJ-RI) | October 31, 1825 |
25 | Nathan Sanford (AJ-NY) | January 14, 1826 |
26 | Ezekiel Forman Chambers (AJ-VA) | January 24, 1826 |
27 | Nathaniel Silsbee (AJ-MA) | May 31, 1826 |
28 | John McKinley (J-AL) | November 27, 1826 |
29 | William Smith (DR-SC) | November 29, 1826 |
30 | Powhatan Ellis (J-MS) | March 4, 1827 | Former senator |
31 | Louis McLane (J-DE)[9] | Former representative (10 years) |
32 | John Tyler (J-VA) | Former representative (4 years, 2 months) |
33 | Samuel Augustus Foot (AJ-CT) | Former representative (4 years, 0 months) |
34 | Isaac Dutton Barnard (J-PA) |
35 | Daniel Webster (AJ-MA) | June 8, 1827 |
36 | Jacob Burnet (AJ-OH) | December 10, 1828 |
37 | James Iredell (J-NC) | December 15, 1828 |
38 | John Holmes (AJ-ME) | January 15, 1829 | Former representative |
39 | Charles Edward Dudley (J-NY) |
40 | George Mortimer Bibb (J-KY) | March 4, 1829 | Former senator (3 years) |
41 | George Michael Troup (J-GA) | Former senator (1 year, 10 months) |
42 | Thomas Buck Reed (J-MS)[10] | Former senator (1 year, 2 months) |
43 | John McLean (J-IL)[11] | Former senator (3 months) |
44 | Edward Livingston (J-LA) | Former representative (12 years) |
45 | Peleg Sprague (AJ-ME) | Former representative (4 years) |
46 | Theodore Frelinghuysen (AJ-NJ) | New Jersey 13th in population (1820) |
47 | John Middleton Clayton (AJ-DE) | Delaware 22nd in population (1820) |
| Felix Grundy (J-TN) | October 19, 1829 |
| John Forsyth (J-GA) | November 9, 1829 |
| Bedford Brown (J-NC) | December 9, 1829 |
| Robert Huntington Adams (J-MS)[12] | January 6, 1830 |
| Arnold Naudain (AJ-DE) | January 13, 1830 |
| George Poindexter (J-MS) | October 15, 1830 |
| David Jewett Baker (D-IL)[13] | November 12, 1830 |
| John McCracken Robinson (J-IL) | December 11, 1830 |