Pre-18 voter registration in
Colorado
In Colorado 74,927
people turn 18 every year.
Coloradans can 
pre-register before turning 18.
To register to vote in Colorado, you must be: 15 years old. That means all eligible seniors, juniors, sophomores and most freshmen in your high school can register to vote today and vote at 18*.
*In Colorado, 17-year-olds can vote in primaries if they will be 18 by Nov 3, 2026.
High school students can help one another get ready to vote. 
Next Steps!
How to Register to Vote in Colorado
Upcoming Elections:
- Jun 30th, 2026 - Colorado Primary Election (Register by Jun 30th, 2026)
- Nov 3rd, 2026 - Colorado General Election (Register by Nov 3rd, 2026)
Useful Links:
- Registration Form - Download the paper registration form for Colorado.
- Registration Status - Check if you are already registered, your polling place, and more from your state’s voter registration website.
- Fair Elections Center - Learn about conducting a registration drive in Colorado.
- Vote 411 - A nonpartisan resource to help you register, preview your ballot, and find key election information from the League of Women Voters.
- VoteRiders - Find out what forms of ID you can use to register and vote, and get help getting a valid form of ID.
Full Registration Details
By Mail: ID Requirements
When submitting your application by mail in Colorado, you are required to provide your Colorado driver’s license number or Colorado ID card number if you have one. If you have not been issued one of these ID numbers, you must provide the last four digits of your Social Security number. If you have not been issued any of these numbers, indicate NONE.
By Mail: Eligibility Requirements
To register in Colorado you must:
be a United States citizen
be a Colorado resident for at least 22 days immediately before the election in which you intend to vote, UNLESS that election is a presidential general election. In this case, you may be a resident for less than 22 days and cast a provisional ballot in person for president and vice president candidates ONLY
be at least 15 years old, and you must be at least 18 on or before Election Day to be eligible to vote
not be serving a sentence of detention or confinement for a felony conviction
By Mail: New Voter Instructions
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 current and valid photo identification OR current utility bill, bank statement, government check, paycheck or government document that shows your name and address. More information here.
Online Instructions
To register online in Colorado, you need to provide at least ONE of the following: Colorado Driver’s License number, Colorado ID card number, OR the last four digits of your Social Security number. If you don’t have a Colorado Driver’s License, Colorado ID card, or Social Security number, you can still submit a voter registration application by mail.
More information here.
Colorado High School Educators!!!
Support your students’ voter registration effort with our free toolkit.
Colorado Requirements for High School Voter Registration
The county clerk and recorder shall train and supervise the high school deputy registrars.
The county clerk and recorder shall issue sufficient materials to each high school deputy registrar for the registration or preregistration of all eligible students, employees, and other persons at the high school which the high school deputy registrar serves.
About this information
This page presents a curated compilation of voting and election information, specifically geared toward high school students, their families, and educators.
Information about deadlines and voting laws is retrieved via the Democracy Works Elections API and was last retrieved on Mar 30th, 2026; the API compiles election guidance from official government sources and other vetted data providers, and details may change over time. Information concerning requirements for high schools is based on The Civics Center’s analysis of State Requirements for High School Voter Registration and was last updated on Mar 27th, 2026.
See More
Information about youth turning 18 each year is from the U.S. Census, and information on the number of 18-year-olds who have not yet registered is based on applying TCC’s analysis of Census data and state voter files. We also provide links to trusted resources, including VoteRiders (for voter ID information) and Fair Elections Center (for information about laws governing voter registration drives).
These pages are offered for guidance only and are not intended as legal advice. Please consult state election officials or an attorney if you have questions about any particular situation. We hope you find this useful. To cite our resources and original research, please provide links and/or cite The Civics Center.
© 2026 The Civics Center
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