Elections / Voter information
Voter information
How to register, how to check what is already on file, and which official office answers for it, in every state and the District of Columbia.
How to register in Colorado
The channels this state runs, the cutoff rule for each one, and the official page that does it.
Three ways to register
Each cutoff below is Colorado's own rule, counted back from Election Day - not a date. The date it lands on depends on the election, so confirm it for yours on Colorado's registration page.
Online8 days before Election DayRegister for the first time, or update your name or address, on Colorado's official system.Register on Colorado's site
By mailMust be postmarked 8 days before Election DayPrint Colorado's registration form, sign it, and mail it to your election office.Get Colorado's form
In personAvailable up to and including on Election DayRegister at your state or local election office, the motor vehicles office, or many public assistance offices.Where to go
Same-day registration: you can still register in person through Election Day.
Check or update your registration
Already registered? Check your name, address and any recorded party affiliation before the deadline.
Official resources
Sourced from the offices that run the election. Deadlines for a specific election, sample ballots, and polling places all live with them.
- Colorado registration instructions ↗The state's own how-to-register page, including its eligibility rules.
- Colorado election office ↗Election dates, deadlines for the next election, and local contacts.
- Colorado on vote.gov ↗The federal guide this page is built from, available in eleven languages.
- National Mail Voter Registration Form (PDF) ↗Published by the federal Election Assistance Commission and accepted by Colorado. Print, sign, and mail it to your election office.
- Military and overseas voters (FVAP) ↗Register and request an absentee ballot from outside the U.S.