Voting in Missouri

How to vote in Missouri in 2026

Every deadline, rule, and official link — kept simple. When you're ready, build a personal plan with calendar reminders in about a minute.

Make your Missouri plan

Key dates

State Primary: Tuesday, August 4, 2026
General Election: Tuesday, November 3, 2026
Register online by: Wednesday, October 7, 2026
Register by mail by: Wednesday, October 7, 2026(postmarked)
Register in person by: Wednesday, October 7, 2026
Request a mail ballot by: Wednesday, October 21, 2026

Deadlines shown are for the November 3, 2026 general election.

Register to vote

Online: Received by the fourth Wednesday before Election Day. By mail: Postmarked by the fourth Wednesday prior to Election Day. In person: Received by the fourth Wednesday prior to Election Day before close of business.

Online — the fastest way
A few minutes on the official site.
Register online in Missouri
By mail
Print, sign, and mail the National Mail Voter Registration Form.
Get the national form (PDF)
In person
At your local election office or DMV.
Missouri election office

Already registered? Double-check.

Moved, changed your name, or just not sure? Check your registration status

Vote by mail

Missouri requires an approved excuse to vote by mail. Received by 5pm on the second Wednesday prior to Election Day

Returning it: Received by the close of polls on Election Day.

Request your Missouri mail ballot

Vote in person

Vote early where available (dates vary by county), or at your polling place on Election Day — Tuesday, November 3, 2026.

Find your polling place Missouri election office See what's on your ballot

Quick answers

Can I register to vote online in Missouri?

Yes — Missouri has official online registration (deadline: Wednesday, October 7, 2026 for the general election). It usually takes a few minutes.

Do I need an excuse to vote by mail?

Yes — Missouri requires an approved excuse (like being away, illness, or disability) to vote by mail.

Can I register on Election Day?

No — same-day registration isn't available in Missouri, so the advance deadline is the one that counts. Online: Received by the fourth Wednesday before Election Day. By mail: Postmarked by the fourth Wednesday prior to Election Day. In person: Received by the fourth Wednesday prior to Election Day before close of business.

When are the 2026 elections?

State Primary: Tuesday, August 4, 2026 · General Election: Tuesday, November 3, 2026

Turn this into your plan

Three questions, then every Missouri deadline lands on your calendar with reminders.

Make your voting plan

Compiled from official state sources, vote.gov, and Ballotpedia (2026 calendars). Rules occasionally change — when it matters, confirm with the Missouri election office. Found an error? Tell us.