Voting in Montana

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All voters are eligible to vote absentee/by mail in Montana; no excuse is needed.

Montana offers in-person absentee voting. No excuse is needed to vote absentee in person. In-person absentee voting begins 30 days prior to the election and ends at noon the day before Election Day.

Montana has open primaries. There is no party registration in Montana. Individuals who vote in a primary election are given all the parties’ ballots, and can choose in private which party ballot they wish to vote. Voters in a primary election cannot vote more than one party’s ballots. 17-year-olds cannot vote in the primary election even if they will be 18 by the corresponding general election.

ID is required to vote in Montana. Valid forms of ID include:
- A current photo ID showing the elector’s name
- A current utility bill, bank statement, paycheck, voter confirmation notice, tribal ID, government check or other government document that shows your name and current address.

If you go to your polling place without an approved form of ID, you can still vote by requesting and filling out a “Polling Place Elector ID” form. Or, you can vote a provisional ballot. Your provisional ballot will be counted if you provide valid ID to the county election office by 5:00 p.m. the day after the election, or mail it to the county election office postmarked by the day after the election.