Elections
Missouri 2026 Primary Election: Date, Rules & What to Know
The Missouri 2026 congressional primary is August 4, 2026. General Election Day is November 3, 2026.
Primary Election · August 4, 2026
General Election · November 3, 2026
What's on the Missouri 2026 Ballot
U.S. House of Representatives
All U.S. House seats in Missouri are on the 2026 ballot. Every House member runs for re-election every two years. View Missouri representatives →
U.S. Senate
Missouri's Senate seats are not on the ballot in 2026. Senate seats rotate on a six-year cycle — Missouri's senators are in Class I or Class III, which are up in 2024/2030 and 2022/2028 respectively. Learn about Senate classes →
Missouri's Primary System: Partisan Open Primary
Missouri holds separate party primaries, but any registered voter may participate — you do not need to be registered with a party. On primary day, you simply request the ballot for the party whose primary you want to vote in.
Missouri 2026 Election Key Dates
| August 4, 2026 | Primary Election |
| October 2026 | Voter registration deadlines (check your state) |
| November 3, 2026 | General Election |
| January 3, 2027 | 120th Congress convenes |
Voter Registration in Missouri
Any registered voter may participate — no party registration required. You may choose which party's primary to vote in on Election Day. Registration deadlines vary — most states require registration 15–30 days before the primary, though some offer same-day registration.
Check your registration status and find your polling place at vote.gov.
See All State Primary Dates
Compare Missouri's primary to other states' 2026 schedules.
Sources
Frequently Asked Questions
When is the Missouri primary election in 2026?
The Missouri 2026 congressional primary is August 4, 2026. The general election is November 3, 2026.
Can I vote in the Missouri primary if I'm not registered with a party?
Any registered voter may participate — no party registration required. You may choose which party's primary to vote in on Election Day.
What is on the Missouri 2026 primary ballot?
All U.S. House seats in Missouri are on the 2026 primary ballot. Missouri's U.S. Senate seats are not up for election in 2026. Most states also hold primaries for governor and state legislature on the same day.
What type of primary does Missouri use?
Missouri holds separate party primaries, but any registered voter may participate — you do not need to be registered with a party. On primary day, you simply request the ballot for the party whose primary you want to vote in.
When is the Missouri voter registration deadline for the 2026 primary?
Voter registration deadlines vary but are typically 15–30 days before the primary. Check the Missouri Secretary of State website or vote.gov for the exact deadline.
When is the Missouri general election in 2026?
The 2026 general election is on Tuesday, November 3, 2026. This date is the same for all 50 states — it is always the first Tuesday after the first Monday in November in even-numbered years.