Maine was admitted to the Union on March 15, 1820. The state's U.S. senators belong to class 1 and class 2. Republican Susan Collins (first elected in 1996) and Independent Angus King (first elected in 2012) are Maine's current U.S. senators, making Maine one of seven states to have a split United States Senate delegation. William P. Frye was Maine's longest serving senator (1881–1911). Maine is one of fifteen states alongside Arizona, Colorado, Florida, Georgia, Hawaii, Idaho, Indiana, Louisiana, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator.
Class 1 |
C | Class 2 | ||||||||||
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# | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
1 | John Holmes |
Democratic- Republican |
Jun 13, 1820 – Mar 3, 1827 |
Elected in 1820. | 1 | 16th | 1 | Elected in 1820. | Jun 14, 1820 – Mar 3, 1829 |
Democratic- Republican |
John Chandler |
1 |
Re-elected in 1821. | 2 | 17th | ||||||||||
18th | 2 | Re-elected in 1823. | ||||||||||
National Republican |
19th | Jacksonian | ||||||||||
2 | Albion Parris |
Jacksonian | Mar 4, 1827 – Aug 26, 1828 |
Elected in 1827. |
3 | 20th | ||||||
Vacant | Aug 26, 1828 – Jan 15, 1829 |
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3 | John Holmes |
National Republican |
Jan 15, 1829 – Mar 3, 1833 |
Elected to finish Parris's term. | ||||||||
21st | 3 | Elected in 1829. |
Mar 4, 1829 – Jan 1, 1835 |
National Republican |
Peleg Sprague |
2 | ||||||
22nd | ||||||||||||
4 | Ether Shepley |
Jacksonian | Mar 4, 1833 – Mar 3, 1836 |
Elected in 1833. |
4 | 23rd | ||||||
Jan 1, 1835 – Jan 20, 1835 |
Vacant | |||||||||||
Elected to finish Sprague's term, having already been elected to the next term. | Jan 20, 1835 – Mar 3, 1841 |
Jacksonian | John Ruggles |
3 | ||||||||
24th | 4 | Elected in 1835. | ||||||||||
5 | Judah Dana |
Jacksonian | Mar 4, 1836 – Mar 3, 1837 |
Appointed to continue Shepley's term. | ||||||||
6 | Reuel Williams |
Democratic | Mar 4, 1837 – Feb 15, 1843 |
Elected to finish Shepley's term. | 25th | Democratic | ||||||
Re-elected in 1839. |
5 | 26th | ||||||||||
27th | 5 | Elected in 1840. |
Mar 4, 1841 – Mar 3, 1847 |
Whig | George Evans |
4 | ||||||
Vacant | Feb 15, 1843 – Dec 4, 1843 |
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28th | ||||||||||||
7 | John Fairfield |
Democratic | Dec 4, 1843 – Dec 24, 1847 |
Elected to finish Williams's term. | ||||||||
Re-elected in 1844 or 1845. |
6 | 29th | ||||||||||
30th | 6 | Elected in 1846.[1] |
Mar 4, 1847 – Mar 3, 1853 |
Democratic | James W. Bradbury |
5 | ||||||
Vacant | Dec 24, 1847 – Jan 5, 1848 |
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8 | Wyman B. S. Moor |
Democratic | Jan 5, 1848 – June 7, 1848 |
Appointed to continue Fairfield's term. | ||||||||
9 | Hannibal Hamlin |
Democratic | Jun 8, 1848 – Jan 7, 1857 |
Elected to finish Fairfield's term. | ||||||||
31st | ||||||||||||
Re-elected in 1851. |
7 | 32nd | ||||||||||
33rd | 7 | Legislature failed to elect. | Mar 4, 1853 – Feb 10, 1854 |
Vacant | ||||||||
Elected to finish term. | Feb 10, 1854 – Jul 1, 1864 |
Whig | William P. Fessenden |
6 | ||||||||
34th | ||||||||||||
Republican | ||||||||||||
Vacant | Jan 7, 1857 – Jan 16, 1857 |
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10 | Amos Nourse |
Republican | Jan 16, 1857 – Mar 3, 1857 |
Elected to finish Hamlin's term. | ||||||||
11 | Hannibal Hamlin |
Republican | Mar 4, 1857 – Jan 17, 1861 |
Elected in 1857. |
8 | 35th | Republican | |||||
36th | 8 | Re-elected in 1859. | ||||||||||
12 | Lot M. Morrill |
Republican | Jan 17, 1861 – Mar 3, 1869 |
Elected to finish Hamlin's term. | ||||||||
37th | ||||||||||||
Re-elected in 1863. |
9 | 38th | ||||||||||
Jul 1, 1864 – Oct 27, 1864 |
Vacant | |||||||||||
Appointed to continue Fessenden's term. |
Oct 27, 1864 – Mar 3, 1865 |
Republican | Nathan A. Farwell |
7 | ||||||||
39th | 9 | Elected in 1864 or 1865. |
Mar 4, 1865 – Sep 8, 1869 |
Republican | William P. Fessenden |
8 | ||||||
40th | ||||||||||||
13 | Hannibal Hamlin |
Republican | Mar 4, 1869 – Mar 3, 1881 |
Elected in 1869. | 10 | 41st | ||||||
Sep 8, 1869 – Oct 30, 1869 |
Vacant | |||||||||||
Appointed to finish Fessenden's term. |
Oct 30, 1869 – Jul 7, 1876 |
Republican | Lot M. Morrill |
9 | ||||||||
42nd | 10 | Re-election year unknown. | ||||||||||
43rd | ||||||||||||
Re-elected in 1875. |
11 | 44th | ||||||||||
Jul 7, 1876 – Jul 10, 1876 |
Vacant | |||||||||||
Appointed to finish Morrill's term. |
Jul 10, 1876 – Mar 5, 1881 |
Republican | James G. Blaine |
10 | ||||||||
45th | 11 | Elected to full term in 1877. | ||||||||||
46th | ||||||||||||
14 | Eugene Hale |
Republican | Mar 4, 1881 – Mar 3, 1911 |
Elected in 1881. | 12 | 47th | ||||||
Mar 5, 1881 – Mar 18, 1881 |
Vacant | |||||||||||
Elected to finish Blaine's term | Mar 18, 1881 – Aug 8, 1911 |
Republican | William P. Frye |
11 | ||||||||
48th | 12 | Re-elected in 1883. | ||||||||||
49th | ||||||||||||
Re-elected in 1887. | 13 | 50th | ||||||||||
51st | 13 | Re-elected in 1889. | ||||||||||
52nd | ||||||||||||
Re-elected in 1893. | 14 | 53rd | ||||||||||
54th | 14 | Re-elected in 1895. | ||||||||||
55th | ||||||||||||
Re-elected in 1899. | 15 | 56th | ||||||||||
57th | 15 | Re-elected in 1901. | ||||||||||
58th | ||||||||||||
Re-elected in 1905. |
16 | 59th | ||||||||||
60th | 16 | Re-elected in 1907. | ||||||||||
61st | ||||||||||||
15 | Charles F. Johnson |
Democratic | Mar 4, 1911 – Mar 3, 1917 |
Elected in 1911. |
17 | 62nd | ||||||
Aug 8, 1911 – Sep 23, 1911 |
Vacant | |||||||||||
Appointed to continue Frye's term. |
Sep 23, 1911 – Mar 3, 1913 |
Democratic | Obadiah Gardner |
12 | ||||||||
63rd | 17 | Elected in 1913. |
Mar 4, 1913 – Jun 16, 1916 |
Republican | Edwin C. Burleigh |
13 | ||||||
64th | ||||||||||||
Jun 16, 1916 – Sep 12, 1916 |
Vacant | |||||||||||
Elected to finish Burleigh's term. | Sep 12, 1916 – Aug 23, 1926 |
Republican | Bert M. Fernald |
14 | ||||||||
16 | Frederick Hale |
Republican | Mar 4, 1917 – Jan 3, 1941 |
Elected in 1916. | 18 | 65th | ||||||
66th | 18 | Re-elected in 1918. | ||||||||||
67th | ||||||||||||
Re-elected in 1922. | 19 | 68th | ||||||||||
69th | 19 | Re-elected in 1924. | ||||||||||
Aug 23, 1926 – Nov 30, 1926 |
Vacant | |||||||||||
Elected to finish Fernald's term. |
Nov 30, 1926 – Mar 3, 1931 |
Republican | Arthur R. Gould |
15 | ||||||||
70th | ||||||||||||
Re-elected in 1928. | 20 | 71st | ||||||||||
72nd | 20 | Elected in 1930. | Mar 4, 1931 – Jan 3, 1949 |
Republican | Wallace H. White |
16 | ||||||
73rd | ||||||||||||
Re-elected in 1934. |
21 | 74th | ||||||||||
75th | 21 | Re-elected in 1936. | ||||||||||
76th | ||||||||||||
17 | Owen Brewster |
Republican | Jan 3, 1941 – Dec 31, 1952 |
Elected in 1940. | 22 | 77th | ||||||
78th | 22 | Re-elected in 1942. | ||||||||||
79th | ||||||||||||
Re-elected in 1946. |
23 | 80th | ||||||||||
81st | 23 | Elected in 1948. | Jan 3, 1949 – Jan 3, 1973 |
Republican | Margaret Chase Smith |
17 | ||||||
82nd | ||||||||||||
Vacant | Dec 31, 1952 – Jan 3, 1953 |
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18 | Frederick G. Payne |
Republican | Jan 3, 1953 – Jan 3, 1959 |
Elected in 1952. |
24 | 83rd | ||||||
84th | 24 | Re-elected in 1954. | ||||||||||
85th | ||||||||||||
19 | Edmund Muskie |
Democratic | Jan 3, 1959 – May 7, 1980 |
Elected in 1958. | 25 | 86th | ||||||
87th | 25 | Re-elected in 1960. | ||||||||||
88th | ||||||||||||
Re-elected in 1964. | 26 | 89th | ||||||||||
90th | 26 | Re-elected in 1966. | ||||||||||
91st | ||||||||||||
Re-elected in 1970. | 27 | 92nd | ||||||||||
93rd | 27 | Elected in 1972. |
Jan 3, 1973 – Jan 3, 1979 |
Democratic | Bill Hathaway |
18 | ||||||
94th | ||||||||||||
Re-elected in 1976. |
28 | 95th | ||||||||||
96th | 28 | Elected in 1978. | Jan 3, 1979 – Jan 3, 1997 |
Republican | William Cohen |
19 | ||||||
Vacant | May 7, 1980 – May 19, 1980 |
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20 | George J. Mitchell |
Democratic | May 19, 1980 – Jan 3, 1995 |
Appointed to finish Muskie's term. | ||||||||
97th | ||||||||||||
Elected to full term in 1982.[3] | 29 | 98th | ||||||||||
99th | 29 | Re-elected in 1984. | ||||||||||
100th | ||||||||||||
Re-elected in 1988. |
30 | 101st | ||||||||||
102nd | 30 | Re-elected in 1990. | ||||||||||
103rd | ||||||||||||
21 | Olympia Snowe |
Republican | Jan 3, 1995 – Jan 3, 2013 |
Elected in 1994. | 31 | 104th | ||||||
105th | 31 | Elected in 1996. | Jan 3, 1997 – present |
Republican | Susan Collins |
20 | ||||||
106th | ||||||||||||
Re-elected in 2000. | 32 | 107th | ||||||||||
108th | 32 | Re-elected in 2002. | ||||||||||
109th | ||||||||||||
Re-elected in 2006. |
33 | 110th | ||||||||||
111th | 33 | Re-elected in 2008. | ||||||||||
112th | ||||||||||||
22 | Angus King |
Independent | Jan 3, 2013 – present |
Elected in 2012. | 34 | 113th | ||||||
114th | 34 | Re-elected in 2014. | ||||||||||
115th | ||||||||||||
Re-elected in 2018. | 35 | 116th | ||||||||||
117th | 35 | Re-elected in 2020. | ||||||||||
118th | ||||||||||||
To be determined in the 2024 election. | 36 | 119th | ||||||||||
120th | 36 | To be determined in the 2026 election. | ||||||||||
# | Senator | Party | Years in office | Electoral history | T | C | T | Electoral history | Years in office | Party | Senator | # |
Class 1 | Class 2 |