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Register to vote in Colorado

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Colorado voter registration guide

Last updated:

Colorado voter registration deadlines

  • Register to vote (online): Received by October 26, 2020
  • Register to vote (by mail): Postmarked by October 26, 2020
  • Register to vote (in person): Received by November 3, 2020

Check your Colorado voter registration status

  • If you can't remember if you're registered to vote, or you want to make sure your information is correct, you can check your Colorado registration using the Colorado voter registration lookup tool.
  • If you're not registered to vote, or you need to update your voter registration information, follow the instructions below.

Colorado voter registration rules

To register in Colorado you must:

  • be a citizen of the United States
  • be a resident of Colorado 22 days prior to Election Day
  • be 18 years old by Election Day (you may pre-register if you are 16). If you are 17, you may vote in a primary if you will turn 18 by the General Election, and
  • not be currently incarcerated after being convicted and sentenced for a felony.

Register to vote online in Colorado

  • You must include your Colorado driver's license number, Colorado state ID number, or the last 4 digits of your social security number with your online voter registration application.
  • Visit the Colorado online voter registration tool.
  • Fill out all the required fields.
  • You will be registered to vote as soon as you finish the workflow.
  • You should receive your voter registration card in the mail within 2-3 weeks. If not, you might want to follow up with your Local Election Office.
  • The deadline to register to vote online is received by October 26, 2020.

Register to vote by mail in Colorado

  1. Download and fill out the National Voter Registration Form.
  2. Box 6 - ID Number: Provide your Colorado driver’s license number or identification number. If you do not have either of these numbers, provide the last 4 digits of your social security number. If you do not have any of these numbers, write "NONE" in this space.
  3. Box 7 - Choice of Party: You may register with a party. If you leave this section blank you will not be registered with any party.
  4. Box 8 - Race or Ethnic Group: Leave blank.
  5. Print, date, and sign the form. If you do not have a printer, you can print the form out at any local library. If you do not have a stamp, you can buy one from any grocery store: just ask the cashier to sell you one.
  6. Mail your voter registration form to the mailing address below. For faster delivery, send the form directly to your Local Election Office.
  7. Your voter registration form must be postmarked by October 26, 2020

Register to vote in person in Colorado

  1. Contact your Local Election Office to find where to register to vote in person.
  2. Bring your Colorado driver's license or state ID card with you. If you don't have one, bring an acceptable document with your name and current address. Acceptable documents include a recent utility bill, bank statement, or paycheck.

Local Election Office

Contact your Local Election Office if you have questions about Colorado voter registration.

Statewide election office

This is the statewide agency that is ultimately responsible for Colorado elections. You can contact them with questions, but your Local Election Office will probably respond faster.

Colorado Secretary of State  
1700 Broadway, Suite 200  
Denver, CO 80290