MO
Missouri Registration Deadlines
Register to vote in Missouri before the deadlines below to participate in upcoming elections.
Online
27 days before election
27 days before election
Postmarked by deadline
In-Person
27 days before election
Upcoming Elections in Missouri
2026 Primary Elections
99 days
Tuesday, June 2, 2026
Online: May 6
Mail: May 6
2026 Midterm Elections
253 days
Tuesday, November 3, 2026
Online: Oct 7
Mail: Oct 7
Official Information
Missouri Voter Registration
Last updated: January 15, 2025
Related Resources
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