South Dakota Congressional Delegation: 1 Representative, 2 Senators
Embed this widgetLast updated: 2026-07-05
House Delegation
1
U.S. Representative (at-large district)
1 Republican
Senate Delegation
2
U.S. Senators
2 Republicans
State Highlights
- John Thune is South Dakota's longest-serving current member of Congress — in office since 1997 (29 years total).
- In the 2024 presidential election, Trump carried South Dakota by 29.3 points.
- Mike Rounds is on the ballot for re-election in 2026.
South Dakota has 1 representative in the U.S. House as an at-large district. South Dakota is represented by 2 U.S. Senators: John Thune (Republican) and Mike Rounds (Republican). Senators serve 6-year terms and representatives serve 2-year terms — see term end dates and election timing for each seat below.
Learn more about congressional term lengths, the Senate class schedule, or the upcoming 2026 election cycle.
Up for Election in 2026
Mike Rounds (Republican) is up for re-election in 2026. All 1 South Dakota U.S. House seat is also on the ballot, since House terms are 2 years.
