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South Dakota was admitted to the Union on November 2, 1889, and elects U.S. senators to class 2 and class 3. Its current U.S. senators are Republicans John Thune (since 2005) and Mike Rounds (since 2015). Karl E. Mundt is South Dakota's longest-serving senator (1948–1973). South Dakota is one of fifteen states alongside Arizona, Colorado, Florida, Georgia, Hawaii, Idaho, Indiana, Louisiana, Maine, Massachusetts, Minnesota, Missouri, Nevada and Utah to have a younger senior senator and an older junior senator. South Dakota's class 3 seat also holds the distinction of having a future Senate Majority Leader (John Thune) defeat and succeed a former Majority Leader (Tom Daschle).

List of senators

Class 2Class 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 3Class 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	#
1	Richard Pettigrew	Republican	Nov 2, 1889 – Mar 3, 1901	Elected in 1889.	1	51st	1	Elected in 1889.Lost re-election.	Nov 2, 1889 – Mar 3, 1891	Republican	Gideon C. Moody	1
						52nd	2	Elected in 1891.	Mar 4, 1891 – Jul 1, 1901	Independent	James H. Kyle	2
						53rd				Populist
				Re-elected in 1894.Lost re-election.	2	54th
		Silver Republican				55th	3	Re-elected in 1897.Died.
						56th
2	Robert J. Gamble	Republican	Mar 4, 1901 – Mar 3, 1913	Elected in 1901.	3	57th				Republican
									Jul 1, 1901 – Jul 11, 1901	Vacant
								Appointed to continue Kyle's term.Elected in 1903 to finish Kyle's term.	Jul 11, 1901 – Mar 3, 1909	Republican	Alfred B. Kittredge	3
						58th	4	Elected to a full term in 1903.Lost renomination.
						59th
				Re-elected in 1907.Lost renomination.	4	60th
						61st	5	Elected in 1909.Lost renomination.	Mar 4, 1909 – Mar 3, 1915	Republican	Coe Crawford	4
						62nd
3	Thomas Sterling	Republican	Mar 4, 1913 – Mar 3, 1925	Elected in 1913.	5	63rd
						64th	6	Elected in 1914.Retired.	Mar 4, 1915 – Mar 3, 1921	Democratic	Edwin S. Johnson	5
						65th
				Re-elected in 1918.Lost renomination.	6	66th
						67th	7	Elected in 1920.	Mar 4, 1921 – Dec 20, 1936	Republican	Peter Norbeck	6
						68th
4	William McMaster	Republican	Mar 4, 1925 – Mar 3, 1931	Elected in 1924.Lost re-election.	7	69th
						70th	8	Re-elected in 1926.
						71st
5	William J. Bulow	Democratic	Mar 4, 1931 – Jan 3, 1943	Elected in 1930.	8	72nd
						73rd	9	Re-elected in 1932.Died.
						74th
									Dec 20, 1936 – Dec 29, 1936	Vacant
								Appointed to continue Norbeck's term.Lost nomination to a full term.	Dec 29, 1936 – Nov 8, 1938	Democratic	Herbert Hitchcock	7
				Re-elected in 1936.Lost renomination.	9	75th
								Elected to finish Norbeck's term.Retired.	Nov 9, 1938 – Jan 3, 1939	Republican	Gladys Pyle	8
						76th	10	Elected in 1938.	Jan 3, 1939 – Jan 3, 1951	Republican	Chan Gurney	9
						77th
6	Harlan J. Bushfield	Republican	Jan 3, 1943 – Sep 27, 1948	Elected in 1942.Died.	10	78th
						79th	11	Re-elected in 1944.Lost renomination.
						80th
Vacant			Sep 27, 1948 – Oct 6, 1948
7	Vera C. Bushfield	Republican	Oct 6, 1948 – Dec 26, 1948	Appointed to finish her husband's term.Resigned when successor appointed.
Vacant			Dec 26, 1948 – Dec 31, 1948
8	Karl Mundt	Republican	Dec 31, 1948 – Jan 3, 1973	Appointed to finish Bushfield's term, having been elected to the next term.
				Elected in 1948	11	81st
						82nd	12	Elected in 1950.	Jan 3, 1951 – Jun 22, 1962	Republican	Francis Case	10
						83rd
				Re-elected in 1954.	12	84th
						85th	13	Re-elected in 1956.Died.
						86th
				Re-elected in 1960.	13	87th
									Jun 22, 1962 – Jul 9, 1962	Vacant
								Appointed to finish Case's term.Lost election to full term.	Jul 9, 1962 – Jan 3, 1963	Republican	Joe Bottum	11
						88th	14	Elected in 1962.	Jan 3, 1963 – Jan 3, 1981	Democratic	George McGovern	12
						89th
				Re-elected in 1966.Retired.	14	90th
						91st	15	Re-elected in 1968.
						92nd
9	James Abourezk	Democratic	Jan 3, 1973 – Jan 3, 1979	Elected in 1972.Retired.	15	93rd
						94th	16	Re-elected in 1974.Lost re-election.
						95th
10	Larry Pressler	Republican	Jan 3, 1979 – Jan 3, 1997	Elected in 1978.	16	96th
						97th	17	Elected in 1980.Lost re-election.	Jan 3, 1981 – Jan 3, 1987	Republican	James Abdnor	13
						98th
				Re-elected in 1984.	17	99th
						100th	18	Elected in 1986.	Jan 3, 1987 – Jan 3, 2005	Democratic	Tom Daschle	14
						101st
				Re-elected in 1990.Lost re-election.	18	102nd
						103rd	19	Re-elected in 1992.
						104th
11	Tim Johnson	Democratic	Jan 3, 1997 – Jan 3, 2015	Elected in 1996.	19	105th
						106th	20	Re-elected in 1998.Lost re-election.
						107th
				Re-elected in 2002.	20	108th
						109th	21	Elected in 2004.	Jan 3, 2005 – present	Republican	John Thune	15
						110th
				Re-elected in 2008.Retired.	21	111th
						112th	22	Re-elected in 2010.
						113th
12	Mike Rounds	Republican	Jan 3, 2015 – present	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

See also

• United States congressional delegations from South Dakota
• List of United States representatives from South Dakota
• Elections in South Dakota

Notes

1. "SENATOR JAMES H. KYLE". The New York Times. February 17, 1891. p. 5.
2. "SENATOR KYLE RE-ELECTED". The New York Times. February 19, 1897. p. 3.
3. "R.J. Gamble Succeeds Pettigrew". The New York Times. January 23, 1901. p. 5.
4. Journal of the Senate of the South Dakota Legislature Commencing January 6, 1903, Eighth Session. Pierre, South Dakota. 1903. p. 298.{{cite book}}: CS1 maint: location missing publisher (link)
5. Journal of the Senate of the South Dakota Legislature Commencing January 6, 1903, Eighth Session. Pierre, South Dakota. 1903. p. 299.{{cite book}}: CS1 maint: location missing publisher (link)

v t e United States senators from South Dakota
Class 2	Pettigrew Gamble Sterling McMaster Bulow H. Bushfield V. Bushfield Mundt Abourezk Pressler T. Johnson Rounds
Class 3	Moody Kyle Kittredge Crawford E. Johnson Norbeck Hitchcock Pyle Gurney Case Bottum McGovern Abdnor Daschle Thune

• Lists of South Dakota officeholders
• United States senators from South Dakota
• Lists of United States senators by state
• Lists of South Dakota politicians