Lewis and Clark County, Montana
Voting in Lewis and Clark County, Montana? Find registration links, ID rules, early and absentee voting options and your sample ballot here. Home to about 75,100 people, Lewis and Clark County ranks 6th 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 Lewis and Clark County, the people who show up to vote decide who represents everyone. The next election for Lewis and Clark County voters is Montana's primary on June 6, 2028; local elections can come sooner, so check your local election office. Many Lewis and Clark County jobs are in health care and retail, so decisions about health care costs and local businesses hit close to home.
About 42,000 people voted for president in Lewis and Clark County in 2024 (about the same as the 42,500 cast in 2020). That equals roughly 70% of the county's estimated 60,000 adults, above the statewide rate of about 66%.
That means roughly 18,000 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, Lewis and Clark County would add about 898 voices, more than enough to decide a close local race.
Lewis and Clark County is rural, with about 22 people per square mile across 3,458 square miles, so every vote carries extra weight in local races. The county is home to about 6.6% of Montana's population.
ZIP codes in or partly in Lewis and Clark County include 59410, 59421, 59601, 59602, 59604, 59620, 59623 and 59624, plus 9 more. Check that your registration is current, look up your sample ballot, and make a plan to vote. Then ask a friend or family member in Lewis and Clark County to do the same.
Voter Assistance Resources
Who runs elections in Lewis and Clark 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 Lewis and Clark 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 Lewis and Clark 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 Lewis and Clark 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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