Boulder County, Colorado
Your guide to voting in Boulder County, Colorado: registration, sample ballots, ID requirements and where to get local help. Home to about 330,000 people, Boulder County ranks 9th in population among Colorado's 64 counties. In Colorado, the county clerk and recorder runs elections, mails every active voter a ballot and staffs voter service centers.
Next Election
March 21, 2028
Voter Portal
Register Online
What's On My Ballot?
ID Requirements
Absentee / Early Voting
Registration Deadline
Register online or by mail at least 8 days before an election; same-day registration is available in person, but registering early helps you get your ballot by mail.
Why Voting Matters
In Boulder County, the people who show up to vote decide who represents everyone. The next election for Boulder County voters is Colorado's 2028 presidential primary, on a date the governor will set no later than March 21, 2028, though a statewide ballot issue could come first on November 2, 2027; local elections can come sooner, so check your local election office. Local work in professional and technical services and health care means debates over broadband and innovation directly affect Boulder County families.
Boulder County voters cast about 196,000 ballots for president in 2024, down about 5% from 206,000 in 2020. Compared with the county's roughly 270,000 adult residents, that works out to about 73%, above the statewide rate of about 68%.
Around 73,600 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 3,680 extra Boulder County ballots, enough to change the result in many close contests.
Boulder County covers about 726 square miles, with roughly 455 residents per square mile. The county is home to about 5.5% of Colorado's population.
ZIP codes in or partly in Boulder County include 80020, 80021, 80025, 80026, 80027, 80301, 80302 and 80303, plus 24 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 Boulder County to join you.
Voter Assistance Resources
Who runs elections in Boulder County? In Colorado, the county clerk and recorder runs elections, mails every active voter a ballot and staffs voter service centers. For registration, polling places, early voting and absentee ballots, contact the Boulder County clerk and recorder.
Statewide directory, Colorado Secretary of State's county clerk roster:
https://www.coloradosos.gov/pubs/elections/Resources/files/CountyClerkRosterWebsite.pdf
See your sample ballot. Go Vote Colorado:
https://www.coloradosos.gov/voter/pages/pub/home.xhtml
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 Boulder 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 Law Colorado, Colorado's Protection and Advocacy agency, at (303) 722-0300. 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 Colorado 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 Boulder 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
Find volunteer opportunities, visit the voting resources page, or shop sustainable products.
Buy the book that led to the creation of this website: Peace is Active by Tom McCann
Share what you’re doing for peace on social media with #peaceisactive