How to vote in Colorado

Registration deadlines, ID, mail and early voting in Colorado, in plain English, with the official links. The Colorado Secretary of State, Elections Division is the final word on every rule.

Check your registration Register online Official election office
Register online Yes: Through the 8th day before Election Day to get a ballot by mail.
Register by mail Through the 8th day before Election Day to get a ballot by mail (the official pages do not say postmarked or received).
Register in person Through Election Day at a voter service and polling center (through the 8th day at driver's license offices and other agencies).
Same-day registration Yes: register and vote in person at any voter service and polling center in your county through 7 p.m. on Election Day.
Voter ID ID required to vote in person; many IDs qualify, including non-photo documents such as a recent utility bill or bank statement with your name and Colorado address.
Voting by mail All-mail elections: every registered voter is mailed a ballot, which must be received (not postmarked) by 7 p.m. on Election Day.
Early voting In-person voting at voter service and polling centers, open at least 8 days before Election Day (except Sundays) through Election Day.
Statewide elections in 2027 November 2, 2027 Coordinated Election (all-mail; can include statewide ballot measures).

Checked against the Colorado election office's website on November 8, 2026. Deadlines are for general elections; primaries, runoffs and local elections can differ. Military and overseas voters have their own rules at FVAP.gov.

Official sources

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