How to register to vote in Missouri

By NPR staff
  •   Last revised Friday, Feb. 13, 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

Last updated Feb. 13, 2026. Military and overseas citizen voters may have different registration deadlines.