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Colorado offers online voter registration. You can register by mail to vote in Colorado by printing a voter registration form, filling it out, and mailing it to your local election office. You can also register to vote in person if you prefer.

We're monitoring election changes related to COVID-19 and making updates to the information below as quickly as possible. Please check back frequently to make sure you have the most up-to-date details.

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

You can register to vote using the Colorado voter registration form. Be sure to read the instructions carefully and fill it out completely. Send the completed form to your local election office.

Use the National Voter Registration Form

  1. Print and fill out the  National Voter Registration Form.
  2. 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.
  3. 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.
  4. Box 8 - Race or Ethnic Group: Leave blank. This information is not required.
  5. Review the "Who can vote?" section above and check that you're eligible.
  6. Sign the form.
  7. Send the completed form to your local election office.
  8. 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

Due to COVID-19, in-person services may have limited availability. Contact your local election office to confirm. See CDC guidance on safe in-person registration and voting.

Election Day registration

Colorado does offer registration on Election Day.

Get step-by-step help

If you’d like more help planning how to register, TurboVote can walk you through the process! They can also help you start the absentee/mail-in ballot request process, send you election reminders, and more.

Military and overseas voters

Active-duty military, their families, and overseas citizens can register to vote and request their absentee ballot using the Federal Post Card Application (FPCA). The FPCA process is done by mail, but your state may offer other options to request and return ballots. Please contact your election official for more information about delivery and return methods, including email, fax, and state online portals. To follow the FPCA process:
  1. 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.
  2. Send the application to your election official.
  3. It is never too early to submit an FPCA! Please do so as soon as possible. .
  4. Please fill out and send back your ballot as soon as you receive it.
  5. 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.
If after submitting your FPCA, your ballot does not arrive, contact your election official first. Then: 
  • 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
FVAP.gov offers additional information on military and overseas voting in Colorado. You can also call 1-800-438-VOTE or email vote@fvap.gov

Check your voter registration status

You can look up your voter registration record and verify that your information is correct using Colorado's voter registration lookup tool.

Election contact information for Colorado

Address:
Secretary of State
1700 Broadway, Suite 200
Denver, CO 80290

Phone Number:
303-894-2200


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