Marin County, California
Marin County, California voter information: how to register, check your status, see your sample ballot and contact your local election office. Home to about 256,000 people, Marin County ranks 26th in population among California's 58 counties. In California, each county elections office, often called the registrar of voters, handles registration, mails ballots and publishes the county voter information guide with your sample ballot.
Next Election
March 7, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register online or by mail at least 15 days before an election; conditional same-day registration is available after the deadline.
Why Voting Matters
Why does voting matter in Marin County? Because every eligible voter here has exactly the same power at the ballot box: one vote. The next election for Marin County voters is California's presidential primary on March 7, 2028; local elections can come sooner, so check your local election office. With health care and retail among the county's biggest employers, issues like health care costs are decided by the officials voters choose.
About 144,000 people voted for president in Marin County in 2024 (down about 8% from 156,000 in 2020). That equals roughly 69% of the county's estimated 209,000 adults, above the statewide rate of about 51%.
Around 65,300 adults here did not vote for president. Some aren't eligible, yet the rest are untapped power: one more voter in every 20 of them would mean about 3,260 extra Marin County ballots, enough to change the result in many close contests.
Marin County covers about 520 square miles, with roughly 493 residents per square mile. The county is home to about 0.7% of California's population.
ZIP codes in or partly in Marin County include 94901, 94903, 94904, 94912, 94913, 94914, 94915 and 94920, plus 33 more. 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
Questions about voting in Marin County? In California, each county elections office, often called the registrar of voters, handles registration, mails ballots and publishes the county voter information guide with your sample ballot. For registration, polling places, early voting and absentee ballots, contact the Marin County elections office (registrar of voters).
Statewide directory, California Secretary of State's county elections offices list:
https://www.sos.ca.gov/elections/voting-resources/county-elections-offices
See your sample ballot. California county elections offices (your county mails and posts your sample ballot):
https://www.sos.ca.gov/elections/voting-resources/county-elections-offices
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 Marin 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 California, California's Protection and Advocacy agency, at (888) 569-7955. 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 California 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 Marin 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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