Yellowstone County, Montana
Your guide to voting in Yellowstone County, Montana: registration, sample ballots, ID requirements and where to get local help. Home to about 172,000 people, Yellowstone County is the most populous of 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
Why does voting matter in Yellowstone County? Because every eligible voter here has exactly the same power at the ballot box: one vote. The next election for Yellowstone County voters is Montana's primary on June 6, 2028; local elections can come sooner, so check your local election office. Many Yellowstone 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 81,400 ballots were cast in Yellowstone County, down about 3% from 83,800 in 2020. With roughly 134,000 adults living in the county, that is around 61% of adult residents, below the statewide rate of about 66%.
Put another way, about 52,700 adults in Yellowstone County sat that election out. Not all of them can vote, but if even 5% of them did, that would be roughly 2,640 more ballots, often more than the margin in races for local councils, school boards, the legislature or Congress.
With about 65 residents per square mile over 2,634 square miles, Yellowstone County is a place where neighbors often know their local officials. About 15% of all Montana residents live here.
ZIP codes in or partly in Yellowstone County include 59002, 59006, 59015, 59024, 59037, 59041, 59044 and 59057, plus 13 more. Confirm your registration, read through your sample ballot before Election Day, and choose whether you will vote early, by mail or in person. Invite someone you know in Yellowstone County to join you.
Voter Assistance Resources
Who runs elections in Yellowstone 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 Yellowstone 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.
Free, nonpartisan help is available before and on every Election Day: call or text the Election Protection hotline at 866-OUR-VOTE (866-687-8683). Spanish: 888-VE-Y-VOTA (888-839-8682). Asian languages: 888-API-VOTE (888-274-8683).
Voters with disabilities in Yellowstone 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 Yellowstone 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
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