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South Dakota U.S. Senate Seat (Class II)

South Dakota · Next election 2026 · 2 active candidates · $5.5M raisedFederal
About This Office

One of two U.S. Senate seats representing the state of South Dakota. Senators serve six-year terms and represent the entire state population.

Total Seats
100
Term Length
6 years
Salary
$174,000
Current Officeholders
This Seat
Sen. Mike Rounds
Sen. Mike RoundsR
U.S. Senator · South Dakota
Tenure
11y
Bills Spon.
63
Votes Missed
0.92%
Cross-party
63
Committees
ChairSecurities, Insurance and Investment Subcommittee
ChairCybersecurity Subcommittee
Appropriations Committee
+15 more
Other Seats
Sen. John Thune
Sen. John ThuneR
U.S. Senator · South Dakota
The 2026 Race

5 candidates filed, 2 active for the 2026 Senate election in South Dakota. Party primary on Jun 2, 2026. General election on Nov 3, 2026.

Primary
Jun 2, 2026
General
Nov 3, 2026
Total Raised
$5.5M
Candidates
2 active / 5 filed
Incumbent
Mike Rounds (R-SD)R
Cash on Hand
$2.8M
Election History
YearWinnerResultRunner-UpTotal Votes
2022John R Thune R69.6%Brian L Bengs D 26.1%348,020
2020Mike Rounds R65.7%Dan Ahlers D 34.3%420,219
2016John R. Thune R71.8%Jay Williams D 28.2%369,656
2014Mike Rounds R50.4%Rick Weiland D 29.5%279,412
2010John Thune R100.0%—227,947
2008Tim Johnson D62.5%Joel Dykstra R 37.5%380,673
2004John Thune R50.6%Tom Daschle D 49.4%391,188
2002Tim Johnson D49.6%John Thune R 49.5%337,501
1998Tom Daschle D62.1%Ron Schmidt R 36.4%262,111
1996Tim Johnson D51.3%Larry Pressler R 48.7%324,487
1992Thomas A. Daschle D64.9%Charlene Haar R 32.5%334,495
1990Larry Pressler R52.4%Ted Muenster D 45.1%258,976
1986Thomas A. Daschle D51.6%James Abdnor R 48.4%295,830
1984Larry Pressler R74.5%George V. Cunningham D 25.5%315,713
1980James Abdnor R58.2%George Mcgovern D 39.4%327,478
State
Population
907,428
Median HH Income
$75K
Unemployment
2.9%
Bachelor's+
31.9%
Veterans
7.9%
Median Age
38.0
Mean HH Income
$99K
Poverty Rate
11.9%
HS or Higher
93.2%
Median Home Value
$257K
Median Rent
$946/mo
Owner-Occupied
68.6%
Under 18 / 65+
24.2% / 18.0%