primary
Missouri Primary Election (verify date at your state's Secretary of State website)
Monday, June 1, 2026 · 10 days away
U.S. House, U.S. Senate, 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.
Missouri holds an open primary — any registered voter may participate, regardless of party affiliation.
Candidates
Candidate profiles are added as races take shape. View all known candidates →
Voter information
Registration deadline
October 6, 2026 (28 days before the November 3 general)