The 2026 United States Senate election in South Dakota will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of South Dakota. Primary elections will be held on June 2, 2026, with a runoff election held on July 28 if no candidate receives at least 35% of the vote in their respective primaries. Two-term Republican Mike Rounds was re-elected in 2020 with 65.7% of the vote and is running for re-election to a third term. South Dakota has been represented in the U.S. Senate exclusively by Republicans since 2015.
Mike Rounds vs. Kristi Noem
Kristi Noem vs. Dusty Johnson
Mike Rounds vs. Julian Beaudion<br />
Mike Rounds vs. Brian Bengs<br />