To use the online voter registration system you must have a current and valid driver’s license, or ID card issued by the Colorado Department of Revenue.
Online registration form (in English and Spanish)
Printable forms (in English and Spanish)
Refer to the box below for information about ID requirements.
Choosing a political party
You may choose a political party affiliation when you register, but it is not required.
There is an online form to withdraw a voter registration on the Colorado Secretary of State website. Identity verification for the online form includes submitting a Colorado driver's license or ID card number issued from the Colorado Department of Revenue, or a Social Security number.
For online voter registration, a valid Colorado driver's license or state issued ID card from the Colorado Department of Revenue is required.
An ID is not required for mail-in registration, but you must provide one of the documents listed on the form to verify residence:
All registered voters in Colorado receive a mail-in ballot. Mail ballots must be received by the county clerk and recorder no later than 7:00 PM on Election Day. Voters are encouraged to drop off ballots at designated drop off locations, drop-box locations, or mail their ballots in time to be received by the county clerk before the polls close. Postmarks do not count; ballots must be in the hands of the county clerk by 7:00 PM on Election Day in order to be counted.
Every registered voter in Colorado receives a mail ballot. If you prefer to vote at the polls, you can vote in-person at a voter service and polling center.
All Colorado voters receive mail ballots.
Constitutional Amendments and ballot questions:
Offices/Measures That May Appear on the Ballot
|Federal (even years)||
President/Vice-President (elected every four years; next election in 2020)
Senator (elected every six years for staggered terms; next election in 2020)
Representative (elected every two years)
|State (even years)||
Governor/Lieutenant Governor, Secretary of State, State Treasurer, Attorney General, Judges
State Senator (elected every two years)
State Representative (elected every two years)
Statewide ballot measures
|Municipal/County (odd years)||
School Board and other boards and commissions
City or Town Council Member
Clerk and Recorder
Surveyor and Treasurer
Local ballot measures
Election Day is November 2, 2021
The best resource to find election dates is the current Elections Calendar. It has dates for the election cycle, including Primaries, General and Coordinated Elections.
The Colorado Secretary of State may inspect and review the practices and procedures of county clerk and recorders, their employees, and other election officials in the conduct of primary, general, and congressional vacancy elections and the registration of electors. Information on the Election Complaint Process.
TRACER, the Campaign Finance Database provides access to candidates’ election committee and Political Action Committee campaign finance filings.
Colorado does not have a single portal for identifying your elected officials.
1-888-VE-Y-VOTA (en Español)
1-888-API-VOTE (Asian multilingual assistance)
Find useful voter information including:
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