Current delegation

Mike Crapo (R)

Jim Risch (R)

Below is a chronological listing of the United States senators from Idaho. The state was admitted to the Union on July 3, 1890, and its U.S. senators belong to class 2 and class 3. Idaho's current U.S. Senators are Republicans Mike Crapo (serving since 1999) and Jim Risch (serving since 2009). William Borah was Idaho's longest-serving senator (1907–1940). Idaho is one of fifteen states alongside Arizona, Colorado, Florida, Georgia, Hawaii, Indiana, Louisiana, Maine, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator.

List of senators

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.						C	Class 3 Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, 2016, and 2022. The next election will be in 2028.
#	Senator	Party	Dates in office	Electoral history	T		T	Electoral history	Dates in office	Party	Senator	#
Vacant			Jul 3, 1890 – Dec 18, 1890	After joining the Union, Idaho did not elect its senators for six months.	1	51st	1	After joining the Union, Idaho did not elect its senators for six months.	Jul 3, 1890 – Dec 18, 1890	Vacant
1	George Shoup	Republican	Dec 18, 1890 – Mar 3, 1901	Elected in 1890.				Elected in 1890. Retired.	Dec 18, 1890 – Mar 3, 1891	Republican	William McConnell	1
						52nd	2	Elected in 1890. Lost re-election as a Silver Republican.	Mar 4, 1891 – Mar 3, 1897	Republican	Fred Dubois	2
						53rd
				Re-elected in 1895. Lost re-election.	2	54th
						55th	3	Elected in 1897. Retired.	Mar 4, 1897 – Mar 3, 1903	Populist	Henry Heitfeld	3
						56th
2	Fred Dubois	Silver Republican	Mar 4, 1901 – Mar 3, 1907	Elected in 1901 as a Silver Republican, but changed party to Democratic. Lost re-election.	3	57th
		Democratic
						58th	4	Elected in 1903.	Mar 4, 1903 – Oct 17, 1912	Republican	Weldon Heyburn	4
						59th
3	William Borah	Republican	Mar 4, 1907 – Jan 19, 1940	Elected in 1907.	4	60th
						61st	5	Re-elected in 1909.[1] Died.
						62nd
									Oct 17, 1912 – Nov 18, 1912	Vacant
								Appointed to continue Heyburn's term. Lost election to finish Heyburn's term.	Nov 18, 1912 – Feb 6, 1913	Democratic	Kirtland Perky	5
								Elected in 1913 to finish Heyburn's term.	Feb 6, 1913 – Jan 13, 1918	Republican	James Brady	6
				Re-elected in 1913.	5	63rd
						64th	6	Re-elected in 1914. Died.
						65th
									Jan 13, 1918 – Jan 22, 1918	Vacant
								Appointed to continue Brady's term. Elected in 1918 to finish Brady's term. Resigned to become a Federal Trade Commissioner, having lost election to a full term.	Jan 22, 1918 – Jan 14, 1921	Democratic	John F. Nugent	7
				Re-elected in 1918	6	66th
								Appointed to finish Brady's term, having been elected to the next term.	Jan 15, 1921 – Jun 24, 1928	Republican	Frank Gooding	8
						67th	7	Elected to full term in 1920.
						68th
				Re-elected in 1924.	7	69th
						70th	8	Re-elected in 1926. Died.
									Jun 24, 1928 – Jun 30, 1928	Vacant
								Appointed to continue Gooding's term. Elected in 1928 to finish Gooding's term. Lost re-election.	Jun 30, 1928 – Mar 3, 1933	Republican	John Thomas	9
						71st
				Re-elected in 1930.	8	72nd
						73rd	9	Elected in 1932. Lost renomination.	Mar 4, 1933 – Jan 3, 1939	Democratic	James P. Pope	10
						74th
				Re-elected in 1936. Died.	9	75th
						76th	10	Elected in 1938. Lost renomination.	Jan 3, 1939 – Jan 3, 1945	Democratic	D. Worth Clark	11
Vacant			Jan 19, 1940 – Jan 27, 1940
4	John Thomas	Republican	Jan 27, 1940 – Nov 10, 1945	Appointed to continue Borah's term. Elected in 1940 to finish Borah's term.
						77th
				Re-elected in 1942. Died.	10	78th
						79th	11	Elected in 1944. Lost renomination.	Jan 3, 1945 – Jan 3, 1951	Democratic	Glen H. Taylor	12
Vacant			Nov 10, 1945 – Nov 17, 1945
5	Charles C. Gossett	Democratic	Nov 17, 1945 – Nov 5, 1946	Appointed to continue Thomas's term. Lost nomination to finish Thomas's term.
6	Henry Dworshak	Republican	Nov 6, 1946 – Jan 3, 1949	Elected in 1946 to finish Thomas's term. Lost re-election.
						80th
7	Bert H. Miller	Democratic	Jan 3, 1949 – Oct 8, 1949	Elected in 1948. Died.	11	81st
Vacant			Oct 8, 1949 – Oct 14, 1949
8	Henry Dworshak	Republican	Oct 14, 1949 – Jul 23, 1962	Appointed to continue Miller's term. Elected in 1950 to finish Miller's term.[2]
						82nd	12	Elected in 1950. Lost re-election.	Jan 3, 1951 – Jan 3, 1957	Republican	Herman Welker	13
						83rd
				Re-elected in 1954	12	84th
						85th	13	Elected in 1956.	Jan 3, 1957 – Jan 3, 1981	Democratic	Frank Church	14
						86th
				Re-elected in 1960. Died.	13	87th
Vacant			Jul 23, 1962 – Aug 6, 1962
9	Len Jordan	Republican	Aug 6, 1962 – Jan 3, 1973	Appointed to continue Dworshak's term. Elected in 1962 to finish Dworshak's term.
						88th	14	Re-elected in 1962.
						89th
				Re-elected in 1966. Retired.	14	90th
						91st	15	Re-elected in 1968.
						92nd
10	Jim McClure	Republican	Jan 3, 1973 – Jan 3, 1991	Elected in 1972.	15	93rd
						94th	16	Re-elected in 1974. Lost re-election.
						95th
				Re-elected in 1978.	16	96th
						97th	17	Elected in 1980.	Jan 3, 1981 – Jan 3, 1993	Republican	Steve Symms	15
						98th
				Re-elected in 1984. Retired.	17	99th
						100th	18	Re-elected in 1986. Retired.
						101st
11	Larry Craig	Republican	Jan 3, 1991 – Jan 3, 2009	Elected in 1990.	18	102nd
						103rd	19	Elected in 1992. Retired to run for Governor of Idaho.	Jan 3, 1993 – Jan 3, 1999	Republican	Dirk Kempthorne	16
						104th
				Re-elected in 1996.	19	105th
						106th	20	Elected in 1998.	Jan 3, 1999 – present	Republican	Mike Crapo	17
						107th
				Re-elected in 2002. Retired.	20	108th
						109th	21	Re-elected in 2004.
						110th
12	Jim Risch	Republican	Jan 3, 2009 – present	Elected in 2008.	21	111th
						112th	22	Re-elected in 2010.
						113th
				Re-elected in 2014.	22	114th
						115th	23	Re-elected in 2016.
						116th
				Re-elected in 2020.	23	117th
						118th	24	Re-elected in 2022.
						119th
To be determined in the 2026 election.					24	120th
						121st	25	To be determined in the 2028 election.
#	Senator	Party	Years in office	Electoral history	T	C	T	Electoral history	Years in office	Party	Senator	#
Class 2							Class 3