Where to vote in Thornton, Colorado on November 3, 2026
- Election DayTue, Nov 3Tuesday, November 3
- Polls open7:00 a.m. – 7:00 p.m.Local time
- Election officeAdams County720-523-6500
Find your polling place Election office Voting dates
Thornton is in Adams County. Thornton has about 147,766 people, by the U.S. Census Bureau's 2025 estimate, which also gives its county lines.
Adams County election office
Adams County Clerk and Recorder
Office: 4430 S. Adams County Pkwy., Ste. E3102, Brighton, CO 80601
Phone: 720-523-6500
Website: adamscountycoelections.gov
Check your registration and find your polling place at GoVoteColorado.gov, the state's voter site.
Colorado voting dates for Thornton voters
| Date | What |
|---|---|
| Fri, Oct 2 Started | Ballots start going out source |
| Mon, Oct 19 | Voter service centers open source |
| Mon, Oct 26 | Register and still get a mail ballot source |
| Tue, Nov 3, 7:00 PM | Election Day: polling centers open 7:00 a.m. to 7:00 p.m. source |
| Tue, Nov 3, 7:00 PM | Register and vote in person source |
| Tue, Nov 3, 7:00 PM | Return your ballot source |
Thornton voting questions
How do I vote in Thornton?
Colorado mails every registered voter a ballot. Return it by mail or to a ballot drop box. Enter your address on the Colorado page to find the nearest.
What is the phone number of the election office for Thornton?
720-523-6500, the Adams County Clerk and Recorder, 4430 S. Adams County Pkwy., Ste. E3102, Brighton, CO 80601.
Which county runs elections in Thornton?
Adams County. Thornton voters register and vote with Adams County.
More for Thornton voters
- Colorado voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Adams County election office: address and phone.
- Who is on the Colorado ballot, race by race.
- What's on my ballot and where do I vote, from your street address.
- Voting in every major U.S. city.
Other big cities in Colorado: Denver, Colorado Springs, Aurora, Fort Collins, Lakewood, Arvada, Westminster, Greeley, Pueblo, Centennial, Boulder, Longmont.
Office details are from the Colorado Secretary of State, Roster of County Clerks and Recorders (checked October 14, 2026). Dates are Colorado's, each linked to its source. Call the office before you go; city population and county lines are from the U.S. Census Bureau.