Missouri voter registration closes Oct 7 for the November 3, 2026 election. Every deadline — registration, mail ballot and early voting — with the official source for each.
Look up your own ballot and polling place →
Register online by Wednesday, Oct 7 (4th Wednesday before the election). Exact online cutoff time not confirmed. Mailed registration forms must be postmarked by Wednesday, Oct 7. Register in person by 5 p.m. Wednesday, Oct 7 (or the building's normal closing time if later).
No-excuse absentee voting in person starts Tuesday, Oct 20 (2nd Tuesday before the election). Ends Monday, Nov 2 at 5 p.m. Statewide no-excuse window Oct 20 - Nov 2 (photo ID required), at locations and hours set by each local election authority. Before Oct 20, in-person absentee voting requires an eligible excuse.
Mailed, faxed or emailed absentee ballot requests must be received by 5 p.m. Wednesday, Oct 21. In-person applications are accepted until 5 p.m. Monday, Nov 2.
Absentee ballots must be received by your local election authority by the time polls close (7 p.m.) on Election Day. Postmarks do not count.
We publish a gap rather than a guess. These points were not settled by an official source:
Every date above was read from the Missouri election office's own published material, last checked Tuesday, September 15, 2026. Confirm anything you are relying on with your local election authority.
https://www.sos.mo.gov/elections/calendar
November 3, 2026 General Election October 7, 2026
https://www.sos.mo.gov/elections/goVoteMissouri/register
Your Voter Registration Form must be POSTMARKED by the 4th Wednesday before the election.
https://revisor.mo.gov/main/OneSection.aspx?section=115.135
a person must be registered to vote in the state of Missouri no later than 5:00 p.m., or the normal closing time of any public building where the registration is being held if such time is later than 5:00 p.m., on the fourth Wednesday prior to the election
https://revisor.mo.gov/main/OneSection.aspx?section=115.279
No application for an absentee ballot received in the office of the election authority by mail, by facsimile transmission, by electronic mail, or by a guardian or relative after 5:00 p.m. on the second Wednesday immediately prior to the election shall be accepted by any election authority
https://revisor.mo.gov/main/OneSection.aspx?section=115.293
no votes on any absentee ballot received by an election authority after the time fixed by law for the closing of the polls on election day shall be counted.
https://www.sos.mo.gov/elections/goVoteMissouri/howtovote
From the second Tuesday before an election to the day before the election, you may vote a no-excuse absentee ballot in person at a location designated by your local election authority.