How to register to vote in Missouri

By NPR staff
  •   Last revised Tuesday, July 14, 2026

Key links

General information Check voter registration status Register online Change registration

Deadlines for Aug. 4 primary election

Online Register by Wednesday, July 8
By mail Postmarked by Wednesday, July 8
In person Register by Wednesday, July 8

Deadlines for Nov. 3 general election

Online Register by Wednesday, Oct. 7
By mail Postmarked by Wednesday, Oct. 7
In person Register by Wednesday, Oct. 7

Last updated July 14, 2026. Military and overseas citizen voters may have different registration deadlines.