List of United States Senators from South Dakota

U.S. Senate; Delegations by State
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This page displays current and historical information pertaining to the U.S. Senate delegation from South Dakota.

Current members

The current members of the U.S. Senate from South Dakota are:

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Office	Name	Party	Date assumed office	Date term ends
U.S. Senate South Dakota	Mike Rounds	Republican	January 3, 2015	January 3, 2027
U.S. Senate South Dakota	John Thune	Republican	January 3, 2005	January 3, 2029

Election history

For more information on the different classes of U.S. Senators, please see: Classes of United States Senators

Class II

Senators in Class II were elected to office in the November 2020 general election, unless they took their seat through appointment or special election. Class II terms run from the beginning of the 117th Congress on January 3, 2021, to the end of the 119th Congress on January 3, 2027.

2020

General election

General election for U.S. Senate South Dakota

Incumbent Mike Rounds defeated Dan Ahlers in the general election for U.S. Senate South Dakota on November 3, 2020.

	Candidate	%	Votes
✔	Mike Rounds (R)	65.7	276,232
	Dan Ahlers (D)	34.3	143,987

	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 420,219
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Democratic primary election

The Democratic primary election was canceled. Dan Ahlers advanced from the Democratic primary for U.S. Senate South Dakota.

Withdrawn or disqualified candidates

Clara Hart (D)

Republican primary election

Republican primary for U.S. Senate South Dakota

Incumbent Mike Rounds defeated Scyller Borglum in the Republican primary for U.S. Senate South Dakota on June 2, 2020.

	Candidate	%	Votes
✔	Mike Rounds	75.2	70,365
	Scyller Borglum	24.8	23,164

	Incumbents are bolded and underlined. The results have been certified. Source	Total votes: 93,529
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2014

On November 4, 2014, Mike Rounds won election to the United States Senate. He defeated Rick Weiland (D), Larry Pressler (I) and Gordon Howie (I) in the general election.^[1]

**U.S. Senate, South Dakota General Election, 2014**
Party		Candidate	Vote %	Votes
	Republican	Mike Rounds	50.4%	140,741
	Democratic	Rick Weiland	29.5%	82,456
	Independent	Larry Pressler	17.1%	47,741
	Independent	Gordon Howie	3%	8,474
Total Votes				279,412
Source: South Dakota Secretary of State

2008

On November 4, 2008, Johnson won re-election to the United States Senate. He defeated Joel Dykstra in the general election.^[2]

U.S. Senate, South Dakota General Election, 2008
Party		Candidate	Vote %	Votes
	Democratic	Tim Johnson Incumbent	62.5%	237,889
	Republican	Joel Dykstra	37.5%	142,784
Total Votes				380,673

2002

On November 5, 2002, Tim Johnson won re-election to the United States Senate. He defeated John Thune (R) and Kurt Evans (L) in the general election.^[3]

U.S. Senate, South Dakota General Election, 2002
Party		Candidate	Vote %	Votes
	Democratic	Tim Johnson incumbent	49.6%	167,481
	Republican	John Thune	49.5%	166,949
	Libertarian	Kurt Evans	0.9%	3,071
Total Votes				337,501

Class III

Senators in Class III were elected to office in the November 2022 general election, unless they took their seat through appointment or special election. Class III terms run from the beginning of the 118th Congress on January 3, 2023, to the end of the 120th Congress on January 3, 2029.

2022

See also: United States Senate election in South Dakota, 2022