Arapahoe County, Colorado
Arapahoe County, Colorado voter information: how to register, check your status, see your sample ballot and contact your local election office. Home to about 667,000 people, Arapahoe County ranks 3rd 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
Why does voting matter in Arapahoe County? Because every eligible voter here has exactly the same power at the ballot box: one vote. The next election for Arapahoe 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. Many Arapahoe 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 325,000 ballots were cast in Arapahoe County, down about 7% from 350,000 in 2020. With roughly 522,000 adults living in the county, that is around 62% of adult residents, below the statewide rate of about 68%.
Around 197,000 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 9,830 extra Arapahoe County ballots, enough to change the result in many close contests.
Across about 798 square miles, Arapahoe County averages around 836 people per square mile, mixing neighborhoods, towns and open land. About 11% of all Colorado residents live here.
ZIP codes in or partly in Arapahoe County include 80010, 80011, 80012, 80013, 80014, 80015, 80016 and 80017, plus 41 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 Arapahoe County to join you.
Voter Assistance Resources
Questions about voting in Arapahoe 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 Arapahoe 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.
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 Arapahoe 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 Arapahoe 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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