Custer County, Montana
Voting in Custer County, Montana? Find registration links, ID rules, early and absentee voting options and your sample ballot here. Home to about 12,000 people, Custer County ranks 17th in population among Montana's 56 counties. In Montana, the county election administrator, usually the clerk and recorder, handles registration and absentee ballots.
Next Election
June 6, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register by mail at least 30 days before an election; late registration is available in person at your county election office through Election Day.
Why Voting Matters
In Custer County, the people who show up to vote decide who represents everyone. The next election for Custer County voters is Montana's primary on June 6, 2028; local elections can come sooner, so check your local election office. Many Custer County jobs are in health care and retail, so decisions about health care costs and local businesses hit close to home.
In the 2024 presidential election, about 5,800 ballots were cast in Custer County, about the same as the 5,880 cast in 2020. With roughly 9,640 adults living in the county, that is around 60% of adult residents, below the statewide rate of about 66%.
That means roughly 3,850 adult residents did not cast a presidential ballot. Some are not eligible, but many are, and that is a lot of untapped power. If just one in 20 of them voted, Custer County would add about 192 voices, more than enough to decide a close local race.
Custer County is rural, with about 3.2 people per square mile across 3,783 square miles, so every vote carries extra weight in local races. The county is home to about 1.1% of Montana's population.
ZIP codes in or partly in Custer County include 59301, 59336, 59338, 59349 and 59351. Take two minutes to confirm your registration, preview your ballot with the links on this page, and decide when and how you will vote. Bring a neighbor along.
Voter Assistance Resources
Local election help in Custer County: In Montana, the county election administrator, usually the clerk and recorder, handles registration and absentee ballots. For registration, polling places, early voting and absentee ballots, contact the Custer County election administrator.
Statewide directory, Montana Secretary of State election contacts:
https://sosmt.gov/elections/contact
See your sample ballot. Montana My Voter Page, which shows your sample ballot:
https://app.mt.gov/voterinfo/
You can also preview a personalized ballot at Vote411.org.
To ask a question or report a problem at the polls, call or text Election Protection at 866-OUR-VOTE (866-687-8683), a free nonpartisan hotline. For help in Spanish call 888-VE-Y-VOTA (888-839-8682); for Asian languages call 888-API-VOTE (888-274-8683).
Voters with disabilities in Custer County can ask for an accessible voting machine, curbside voting where offered, and help from a person of their choice. If you run into barriers, contact Disability Rights Montana, Montana's Protection and Advocacy agency, at (406) 449-2344. VoteRiders (844-338-8743) offers free help with voter ID.
Need a ride? Many local transit agencies and ride services offer free or discounted rides to the polls on Election Day, so check what is available before the next election. See our Montana voter page for statewide options. Details can change, so confirm with the official election office.
Military and overseas voters can get help from the Federal Voting Assistance Program at 1-800-438-VOTE (8683) or fvap.gov.
Sign up to be an election worker
Election workers (often called poll workers) keep voting running smoothly in Custer County. Most are paid for their time, get free training, and help their neighbors cast their ballots. You can work a full day, a shorter shift, or help before Election Day. County and municipal election offices recruit and train their own workers, and the EAC's Help America Vote page links to yours. Find out how to sign up:
https://www.eac.gov/help-america-vote
Take the Next Step
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