States in the Senate | Maine Senators
| CONGRESS | SENATOR | TERM BEGAN | TERM ENDED | COMMENTS |
|---|---|---|---|---|
| Class 1 | ||||
| 16th-19th | John Holmes (DR) | Jun. 13, 1820 | Mar. 3, 1827 | |
| 20th | Albion K. Parris (J) | Mar. 4, 1827 | Aug. 26, 1828 | Resigned |
| 20th-22nd | John Holmes (Adams-R) | Jan. 15, 1829 | Mar. 3, 1833 | |
| 23rd-24th | Ether Shepley (J) | Mar. 4, 1833 | Mar. 3, 1836 | Resigned |
| 24th | Judah Dana (J) | Dec. 7, 1836 | Mar. 3, 1837 | Appointed |
| 25th-27th | Reuel Williams (D) | Mar. 4, 1837 | Feb. 15, 1843 | Resigned |
| 28th-30th | John Fairfield (D) | Mar. 7, 1843 | Dec. 24, 1847 | Died |
| 30th | Wyman B. S. Moor (D) | Jan. 5, 1848 | Jun. 7, 1848 | Appointed |
| 30th-34th | Hannibal Hamlin (D) | Jun. 8, 1848 | Jan. 7, 1857 | Resigned |
| 34th | Amos Nourse (R) | Jan. 16, 1857 | Mar. 3, 1857 | |
| 35th-36th | Hannibal Hamlin (R) | Mar. 4, 1857 | Jan. 17, 18611 | Resigned |
| 36th-40th | Lot M. Morrill (R) | Jan. 17, 1861 | Mar. 3, 1869 | |
| 41st-46th | Hannibal Hamlin (D, R) | Mar. 4, 1869 | Mar. 3, 1881 | |
| 47th-61st | Eugene Hale (R) | Mar. 4, 1881 | Mar. 3, 1911 | |
| 62nd-64th | Charles F. Johnson (D) | Mar. 4, 1911 | Mar. 3, 1917 | |
| 65th-76th | Frederick Hale (R) | Mar. 4, 1917 | Jan. 3, 1941 | |
| 77th-82nd | Ralph O. Brewster (R) | Jan. 3, 1941 | Dec. 31, 1952 | Resigned |
| 83rd-85th | Frederick G. Payne (R) | Jan. 3, 1953 | Jan. 3, 1959 | |
| 86th-96th | Edmund S. Muskie (D) | Jan. 3, 1959 | May 7, 1980 | Resigned |
| 96th-103rd | George J. Mitchell (D) | May 17, 1980 | Jan. 3, 1995 | Appointed, then elected. |
| 104th-112th | Olympia J. Snowe (R) | Jan. 3, 1995 | Jan. 3, 2013 | |
| 113th- | Angus S. King, Jr. (I) | Jan. 3, 2013 | Present | |
| Class 2 | ||||
| 16th-20th | John Chandler (DR, CRR, J) | Jun. 14, 1820 | Mar. 3, 1829 | |
| 21st-23rd | Peleg Sprague (AJ) | Mar. 4, 1829 | Jan. 1, 1835 | Resigned |
| 23rd-26th | John Ruggles (J, D) | Jan. 20, 1835 | Mar. 3, 1841 | |
| 27th-29th | George Evans (W) | Mar. 4, 1841 | Mar. 3, 1847 | |
| 30th-32nd | James W. Bradbury (D) | Mar. 4, 1847 | Mar. 3, 1853 | |
| 33rd-38th | William P. Fessenden (W, OP, R) | Feb. 10, 18542 | Jul. 1, 1864 | Resigned |
| 38th | Nathan A. Farwell (R) | Oct. 27, 1864 | Mar. 3, 1865 | Appointed, then elected |
| 39th-41st | William P. Fessenden (R) | Mar. 4, 1865 | Sept. 8, 1869 | Died |
| 41st-44th | Lot M. Morrill (R) | Oct. 30, 1869 | Jul. 7, 1876 | Appointed, then elected; resigned |
| 44th-47th | James G. Blaine (R) | Jul. 10, 1876 | Mar. 5, 1881 | Appointed, then elected; resigned |
| 47th-62nd | William P. Frye (R) | Mar. 18, 1881 | Aug. 8, 1911 | Died |
| 62nd | Obadiah Gardner (D) | Sept. 23, 1911 | Mar. 3, 1913 | Appointed, then elected |
| 63rd-64th | Edwin C. Burleigh (R) | Mar. 4, 1913 | Jun. 16, 1916 | Died |
| 64th-69th | Bert M. Fernald (R) | Sept. 12, 1916 | Aug. 23, 1926 | Died |
| 69th-71st | Arthur R. Gould (R) | Nov. 30, 1926 | Mar. 3, 1931 | |
| 72nd-80th | Wallace H. White, Jr. (R) | Mar. 4, 1931 | Jan. 3, 1949 | |
| 81st-92nd | Margaret Chase Smith (R) | Jan. 3, 1949 | Jan. 3, 1973 | |
| 93rd-95th | William D. Hathaway (D) | Jan. 3, 1973 | Jan. 3, 1979 | |
| 96th-104th | William S. Cohen (R) | Jan. 3, 1979 | Jan. 3, 1997 | |
| 105th- | Susan M. Collins (R) | Jan. 3, 1997 | Present | |
1. Resigned Jan. 7, 1861, effective January 17, 1861, having been elected vice president of the United States for the 19th term.
2. Vacancy from Mar. 4, 1853 to Feb. 9, 1854 due to failure of the legislature to elect.
