Colorado

Voting in Colorado

From the state election office’s own website. Each answer shows the official wording it comes from.

Registration deadline

October 26 is the deadline to register and still be mailed a ballot. After that date, register and then vote in person.

Official wording: “October 26 - Deadline to register to vote and still be mailed a ballot. * After this date, register and then vote in person.” — state election office, page read October 17, 2026

Register on Election Day

If you miss the deadlines, you may register in person at a voter service and polling center in your county through Election Day.

Official wording: “If you miss the above deadlines, you may register in-person at a voter service and polling center in your county through Election Day.” — state election office, page read October 18, 2026

Register online

You may register online at GoVoteColorado.gov if you have a valid Colorado driver's license or state ID card, or by giving the last four digits of your Social Security number.

Official wording: “You may register online at www.GoVoteColorado.gov, if you have a valid Colorado driver's license or state issued ID card from the Colorado Department of Revenue, or you may register by providing the last four digits of your social security number.” — state election office, page read October 18, 2026

Early voting

October 19 is the date by which the minimum number of required voter centers must be open.

Official wording: “October 19 - The minimum number of required voter centers must be open.” — state election office, page read October 18, 2026

Who can vote by mail

County Clerks will mail ballots by Postal Service to every active voter between October 2 and October 9.

Official wording: “Colorado's County Clerks will mail ballots via the Postal Service to every active voter between October 2 and October 9” — state election office, page read October 18, 2026

Mail ballot due

Mail ballots must be received by the county clerk and recorder no later than 7:00 PM on Election Day.

Official wording: “Mail ballots must be received by the county clerk and recorder no later than 7:00 PM on Election Day.” — state election office, page read October 18, 2026

ID at the polls

All voters who vote at the polls must provide identification.

Official wording: “All voters who vote at the polls must provide identification.” — state election office, page read October 16, 2026

Election Day hours

In-person voting on Election Day, Tuesday, November 3, will be available from 7:00 AM - 7:00 PM.

Official wording: “In-person voting on Election Day, Tuesday, November 3, will be available from 7:00 AM - 7:00 PM.” — state election office, page read October 17, 2026

For anything not listed, and to check your registration, see Colorado’s election office: sos.state.co.us