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Last update: Apr 21, 2021
Who can vote
To register in Colorado you must:
- be a citizen of the United States
- be a resident of Colorado for at least 22 days immediately before the Election in which you intend to vote
- be at least 16 years old, but you must be at least 17 and turning 18 on or before the date of the next general election to be eligible to vote in a primary election, and at least 18 to be eligible to vote in any other election
- not be serving a sentence of detention or confinement for a felony conviction
- You can find more information on voting rights restoration here
Online voter registration
- Colorado offers online voter registration.
- You should know: you need a Colorado driver's license or ID card to use Colorado's online voter registration system. If you don't have a Colorado-issued ID, you can still register by mail to vote.
By-mail voter registration
Use the Colorado voter registration form
Use the National Voter Registration Form
- Print and fill out the National Voter Registration Form.
- Box 6 - ID Number: Your completed voter registration form must contain your Colorado driver's license number or identification card number. If you do not have a driver's license or CO-issued identification, you must include the last four digits of your Social Security number. If you do not have a driver's license or a CO-issued identification or a Social Security number, please write "NONE" on the form. A unique identifying number will be assigned by the State.
- Box 7 - Choice of Party: Colorado does NOT require that you register with a party to participate in partisan primary elections. If you do not affiliate with a party you may choose the party primary you wish to vote in. If you choose to register with a party you can only vote in that party's primary.
- Box 8 - Race or Ethnic Group: Leave blank. This information is not required.
- Review the "Who can vote?" section above and check that you're eligible.
- Sign the form.
- Send the completed form to your local election office.
- If you are registering to vote for the first time in your jurisdiction and are mailing this registration application, Federal law requires you to show proof of identification the first time you vote. Proof of identification includes: A current and valid photo identification or A current utility bill, bank statement, government check, paycheck or government document that shows your name and address. More information here.
In-person voter registration
- You can also register to vote in person. Contact your local election office for information on when and where to register to vote.
- You can also register to vote and cast a ballot in person on Election Day.
- Learn more by visiting the Secretary of State for Colorado or contacting your local election office.
Election Day registration
Get step-by-step help
Military and overseas voters
- Fill out the Federal Post Card Application (FPCA), or download a copy. Your election official may have questions, so please provide an email address or phone number where they can reach you.
- Send the application to your election official.
- It is never too early to submit an FPCA! Please do so as soon as possible. .
- Please fill out and send back your ballot as soon as you receive it.
- States begin mailing absentee ballots at least 45 days before Election Day. If you haven't received your ballot by 30 days before Election Day, contact your local election office.
- You can still vote using the Federal Write-In Absentee Ballot (FWAB). Print, sign, and mail your FWAB to your local Board of Registrars.
- If you mail a FWAB and then receive your regular absentee ballot, you should complete and mail your absentee ballot also. Election officials will ensure that only one ballot is counted.The Federal Voting Assistance Program
Check your voter registration status
Election contact information for Colorado
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