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Montana does not offer online voter registration. For information on how to register to vote or update your registration, visit the state's voter registration information webpage: https://sos.mt.gov/elections/vote.
Local Election Office Directory
State Election Office Phone Numbers:
406-444-9608
406-444-2034
Voter Registration Information | Voting Information |
| Register to Vote | Absentee/ Mail and/or Early Voting |
| Update Your Registration | Track Your Ballot |
| Check Your Registration | In-Person Voting Location Lookup |
| Cancel Your Registration: Contact your local election office. | Military Voters |
| Overseas Citizen Voters | |
| Update Political Party: Montana voters do not register by political party and are not required to declare a political party affiliation. |
| Registration Deadline |
|---|
| 30 days before Election Day by mail |
*In-person late registration at your county office or county-designated location ends at noon the day prior to the election. You can register and vote at your county office or county-designated location on Election Day.
*If you miss the regular registration deadline, Montana provides late registration. Contact your county election office for current late-registration locations, hours, and deadlines.
Updated on September 9, 2026.
