# List of United States senators in the 27th Congress

This is a complete list of members of the United States Senate during the 27th United States Congress listed by seniority, from March 4, 1841, to March 3, 1843.
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 1842 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 3 | Terms of service of senators that expired in 1843 (AL, AR, CT, GA, IL, IN, KY, LA, MD, MO, NC, NH, NY, OH, PA, SC, and VT.) |
| Class 1 | Terms of service of senators that expired in 1845 (CT, DE, IN, MA, MD, ME, MI, MN, MO, MS, NJ, NY, OH, PA, RI, TN, VA, and VT.) |
| Class 2 | Terms of service of senators that expired in 1847 (AL, AR, DE, GA, IL, KY, LA, MA, ME, MI, MS, 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 | William Rufus de Vane King (D-AL) | December 14, 1819 | |
| 2 | Thomas Hart Benton (D-MO) | August 10, 1821 |
| 3 | Samuel Prentiss (AJ-VT) | March 4, 1831 |
| 4 | Henry Clay (W-KY) | November 10, 1831 |
| 5 | John Caldwell Calhoun (D-SC) | December 29, 1832 |
| 6 | Silas Wright, Jr. (D-NY) | January 4, 1833 |
| 7 | Samuel Lewis Southard (D-NJ) | March 4, 1833 | Former senator |
| 8 | Nathaniel Pitcher Tallmadge (W-NY) | March 4, 1833 |
| 9 | Lewis Fields Linn (D-MO) | October 25, 1833 |
| 10 | William Campbell Preston (N-SC) | November 26, 1833 |
| 11 | James Buchanan (D-PA) | December 6, 1834 |
| 12 | Alfred Cuthbert (D-MD) | January 12, 1835 |
| 13 | Robert John Walker (D-MS) | March 4, 1835 |
| 14 | William Cabell Rives (W-VA) | March 4, 1836 |
| 15 | Richard Henry Bayard (W-DE) | June 17, 1836 |
| 16 | Ambrose Hundley Sevier (D-AR) | September 18, 1836 | Former delegate |
| 17 | William Savin Fulton (D-AR) | September 18, 1836 |
| 18 | Thomas Clayton (W-DE) | January 9, 1837 |
| 19 | Alexander Mouton (D-LA) | January 12, 1837 |
| 20 | Franklin Pierce (D-NH) | March 4, 1837 | Former representative (4 years) |
| 21 | William Allen (D-OH) | March 4, 1837 | Former representative (2 years); Ohio 5th in population (1830) |
| 22 | Oliver Hampton Smith (W-IN) | March 4, 1837 | Former representative (2 years); Indiana 13th in population (1830) |
| 23 | Reuel Williams (D-ME) | March 4, 1837 | Maine 12th in population (1830) |
| 24 | Perry Smith (D-CT) | March 4, 1837 | Connecticut 16th in population (1830) |
| 25 | Richard Montgomery Young (D-IL) | March 4, 1837 | Illinois 20th in population (1830) |
| 26 | Clement Comer Clay (D-AL) | June 19, 1837 |
| 27 | William Duhurst Merrick (W-MD) | January 4, 1838 |
| 28 | Albert Smith White (W-IN) | March 4, 1839 | Former representative |
| 29 | Benjamin Tappan (D-OH) | March 4, 1839 | Ohio 5th in population (1830) |
| 30 | Samuel Shethar Phelps (W-VT) | March 4, 1839 | Vermont 17th in population (1830) |
| 31 | John Henderson (W-MS) | March 4, 1839 | Mississippi 22nd in population (1830) |
| 32 | Nathan Fellows Dixon (W-RI) | March 4, 1839 | Rhode Island 23rd in population (1830) |
| 33 | Daniel Sturgeon (D-PA) | January 14, 1840 |
| 34 | Augustus Seymour Porter (W-MI) | January 20, 1840 |
| 35 | Jabez Williams Huntington (W-CT) | May 4, 1840 |
| 36 | Willie Person Mangum (W-NC) | November 25, 1840 | Former senator |
| 37 | William Alexander Graham (W-NC) | November 25, 1840 |
| 38 | Alfred Osborn Pope Nicholson (D-TN) | December 25, 1840 |
| 39 | John Leeds Kerr (W-MD) | January 5, 1841 |
| 40 | Isaac Chapman Bates (W-MA) | January 13, 1841 |
| 41 | Rufus Choate (W-MA) | February 23, 1841 |
| 42 | Levi Woodbury (D-NH) | March 4, 1841 | Former senator (5 years) |
| 43 | John Macpherson Berrien (W-GA) | March 4, 1841 | Former senator (4 years) |
| 44 | William Segar Archer (W-VA) | March 4, 1841 | Former representative (15 years) |
| 45 | George Evans (W-ME) | March 4, 1841 | Former representative (11 years) |
| 46 | William Woodbridge (W-MI) | March 4, 1841 | Former delegate (1 year) |
| 47 | James Turner Morehead (W-KY) | March 4, 1841 | Former governor |
| 48 | Jacob Welsh Miller (W-NJ) | March 4, 1841 | New Jersey 14th in population (1830) |
| 49 | Alexander Barrow (W-LA) | March 4, 1841 | Louisiana 19th in population (1830) |
| 50 | Samuel McRoberts (D-IL) | March 4, 1841 | Illinois 20th in population (1830) |
| 51 | James F. Simmons (W-RI) | March 4, 1841 | Rhode Island 23rd in population (1830) |
| 52 | Arthur Pendleton Bagby (D-AL) | November 24, 1841 |
| | William Sprague III (W-RI) | February 18, 1842 |
| | Leonard Wilcox (D-NH) | March 1, 1842 |
| | John Jordan Crittenden (W-KY) | March 31, 1842 |
| | Charles Magill Conrad (W-LA) | April 14, 1842 |
| | Samuel Chandler Crafts (W-VT) | April 23, 1842 |
| | William Lewis Dayton (W-NJ) | July 2, 1842 |
| | George McDuffie (D-SC) | December 23, 1842 |