South Dakota Primary Election
Tuesday, June 2, 2026 · 11 days away
U.S. House, U.S. Senate, Governor, statewide offices
What’s being decided
A primary election determines which candidates advance to the November general election. Voters in each party select their nominee, and the winners face each other in the fall.
South Dakota holds an closed primary — only voters registered with a party may vote in that party's primary.
Candidates
U.S. Senate
Republican · Incumbent since 2015
Mike Rounds has represented South Dakota in the U.S. Senate since 2015. Before serving in the Senate, he was Governor of South Dakota from 2003 to 2011. He sits on the Senate Armed Services and Banking committees and has been a consistent voice for South Dakota's agricultural interests and military installations.
Voter information
Registration deadline
October 19, 2026 (15 days before the November 3 general)