How to register to vote in Montana

By NPR staff
  •   Last revised Tuesday, May 12, 2026

Key links

Deadlines for June 2 primary election

By mail Postmarked by Monday, May 4
Mail registration forms must be postmarked by May 4 and received by May 7.
In person Register by Tuesday, June 2

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