How to vote in Missouri

Registration deadlines, ID, mail and early voting in Missouri, in plain English, with the official links. The Missouri Secretary of State, Elections Division is the final word on every rule.

Check your registration Register online Official election office
Register online Yes: By the fourth Wednesday before Election Day (the official site gives one deadline for all methods)
Register by mail Postmarked by the fourth Wednesday before Election Day
Register in person By the close of business on the fourth Wednesday before Election Day
Same-day registration No
Voter ID Photo ID required; voters without one may cast a provisional ballot that counts if they return with ID on Election Day or their signature matches.
Voting by mail Absentee by mail only with a listed excuse, such as being away on Election Day, illness or disability, religious belief, or certain jobs.
Early voting No-excuse in-person absentee voting from the second Tuesday before Election Day through the day before.
Statewide elections in 2027 The official 2027 calendar lists election dates of February 2 (bond issues only), March 2 (charter cities and counties), April 6 (general municipal), August 3 and November 2, 2027, with registration deadlines of January 6, February 3, March 10, July 7 and October 6; it does not list any statewide offices.

Checked against the Missouri election office's website on November 8, 2026. Deadlines are for general elections; primaries, runoffs and local elections can differ. Military and overseas voters have their own rules at FVAP.gov.

Official sources

Next