List of United States senators from Maine

Current delegation

Susan Collins (R)

Angus King (I)

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 Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012, and 2018. The next election will be in 2024.						C	Class 2 Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2002, 2008, 2014, and 2020. The next election will be in 2026.
#	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. Retired.
		National Republican				19th				Jacksonian
2	Albion Parris	Jacksonian	Mar 4, 1827 – Aug 26, 1828	Elected in 1827. Resigned to become a judge on the Maine Supreme Judicial Court.	3	20th
Vacant			Aug 26, 1828 – Jan 15, 1829
3	John Holmes	National Republican	Jan 15, 1829 – Mar 3, 1833	Elected to finish Parris's term. Retired.
						21st	3	Elected in 1829. Resigned.	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. Resigned to become Justice of the Maine Supreme Judicial Court.	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. Lost re-election.
5	Judah Dana	Jacksonian	Mar 4, 1836 – Mar 3, 1837	Appointed to continue Shepley's term. Either lost election to finish the term or retired when elected successor qualified.
6	Reuel Williams	Democratic	Mar 4, 1837 – Feb 15, 1843	Elected to finish Shepley's term.		25th				Democratic
				Re-elected in 1839. Resigned.	5	26th
						27th	5	Elected in 1840. Lost re-election.	Mar 4, 1841 – Mar 3, 1847	Whig	George Evans	4
Vacant			Feb 15, 1843 – Dec 4, 1843
						28th
7	John Fairfield	Democratic	Dec 4, 1843 – Dec 24, 1847	Elected to finish Williams's term.
				Re-elected in 1844 or 1845. Died.	6	29th
						30th	6	Elected in 1846.[1] Retired.	Mar 4, 1847 – Mar 3, 1853	Democratic	James W. Bradbury	5
Vacant			Dec 24, 1847 – Jan 5, 1848
8	Wyman B. S. Moor	Democratic	Jan 5, 1848 – June 7, 1848	Appointed to continue Fairfield's term. Successor elected.
9	Hannibal Hamlin	Democratic	Jun 8, 1848 – Jan 7, 1857	Elected to finish Fairfield's term.
						31st
				Re-elected in 1851. Changed parties in 1856. Resigned to become Governor of Maine.	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
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. Resigned to become Vice President of the United States.	8	35th				Republican
						36th	8	Re-elected in 1859. Resigned to become U.S. Secretary of the Treasury.
12	Lot M. Morrill	Republican	Jan 17, 1861 – Mar 3, 1869	Elected to finish Hamlin's term.
						37th
				Re-elected in 1863. Lost re-election.	9	38th
									Jul 1, 1864 – Oct 27, 1864	Vacant
								Appointed to continue Fessenden's term. Elected in 1865 to finish Fessenden's term.[2] Retired.	Oct 27, 1864 – Mar 3, 1865	Republican	Nathan A. Farwell	7
						39th	9	Elected in 1864 or 1865. Died.	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. Elected in 1870 to finish Fessenden's term.[2]	Oct 30, 1869 – Jul 7, 1876	Republican	Lot M. Morrill	9
						42nd	10	Re-election year unknown. Resigned to become U.S. Secretary of the Treasury.
						43rd
				Re-elected in 1875. Retired.	11	44th
									Jul 7, 1876 – Jul 10, 1876	Vacant
								Appointed to finish Morrill's term. Elected in 1877 to finish Morrill's term.[2]	Jul 10, 1876 – Mar 5, 1881	Republican	James G. Blaine	10
						45th	11	Elected to full term in 1877. Resigned to become U.S. Secretary of State.
						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. Retired.	16	59th
						60th	16	Re-elected in 1907. Died.
						61st
15	Charles F. Johnson	Democratic	Mar 4, 1911 – Mar 3, 1917	Elected in 1911. Lost re-election.	17	62nd
									Aug 8, 1911 – Sep 23, 1911	Vacant
								Appointed to continue Frye's term. Elected in 1912 to finish Frye's term.[2] Lost re-election.	Sep 23, 1911 – Mar 3, 1913	Democratic	Obadiah Gardner	12
						63rd	17	Elected in 1913. Died.	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. Died.
									Aug 23, 1926 – Nov 30, 1926	Vacant
								Elected to finish Fernald's term. Retired.	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. Retired.	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. Retired.
						79th
				Re-elected in 1946. Resigned, having already lost renomination.	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
18	Frederick G. Payne	Republican	Jan 3, 1953 – Jan 3, 1959	Elected in 1952. Lost re-election.	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. Lost re-election.
						91st
				Re-elected in 1970.	27	92nd
						93rd	27	Elected in 1972. Lost re-election.	Jan 3, 1973 – Jan 3, 1979	Democratic	Bill Hathaway	18
						94th
				Re-elected in 1976. Resigned to become U.S. Secretary of State.	28	95th
						96th	28	Elected in 1978.	Jan 3, 1979 – Jan 3, 1997	Republican	William Cohen	19
Vacant			May 7, 1980 – May 19, 1980
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. Retired.	30	101st
						102nd	30	Re-elected in 1990. Retired.
						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. Retired.	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
				Re-elected in 2024.	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

• List of United States representatives from Maine
• United States congressional delegations from Maine
• Elections in Maine

• Byrd, Robert C.; Wolff, Wendy (October 1, 1993). The Senate, 1789-1989: Historical Statistics, 1789-1992 (volume 4 Bicentennial ed.). U.S. Government Printing Office.