All voters can receive a mail ballot before each Election Day. If you need to update the address you want you ballot mailed to, use the online tool to fill out the Voter Registration Application and update your address. You can sign up to track your mail ballot on your Secretary of State website. 

If you vote in-person, you may return your mail ballot and vote in-person at a voter service and polling center. Even if you do not return your mail ballot you may still vote in person. Once you vote in person your county clerk will not accept for counting any ballot that was mailed to you. The deadline to vote in-person is 7:00 PM on Election Day.

If you are a first time voter who registers by mail to vote in Colorado, you are required to submit one of the forms of identification (listed below) with your application. If you have not already done so, you must also submit a copy of one of these forms of identification when you return your absentee ballot application. DO NOT include original documents with the application. You must place the copy of ID in the outer envelope of the ballot, not inside the ballot itself. Please submit a copy of one of the following forms of identification:

• A valid Colorado driver's license
• A valid Colorado Department of Revenue ID card
• A valid pilot's license issued by the Federal Aviation Administration
• A valid U.S. Military ID card with a photograph
• A valid Medicare or Medicaid card
• A certified copy of a U.S. birth certificate
• Certified documentation of naturalization
• A valid U.S. passport
• A valid student ID card with a photograph 
• A valid identification card issued by a federally recognized tribal government certifying tribal membership
• Valid employee identification with a photograph issued by the U.S. government, Colorado state government, or any county, municipality, board, authority, or other political subdivision of the state
• A valid veteran identification card issued by the U.S. department of veterans affairs veterans health administration with a photograph of the eligible elector.
• A copy of a current utility bill, bank statement, government check, paycheck, or another government document that shows your name and address. A cable bill, telephone bill or documentation from a Colorado public institution of higher education containing at least your name, date of birth, and legal residence address, or a paycheck from a government institution are also sufficient forms of ID

Note: Some forms of ID may not contain an address. If your address appears on the identification, the address must be in Colorado.

Ballots are mailed 22 days before Election Day, or three days after the County Clerk receives the request for a mail-in ballot.

To vote, fill out your ballot, sign it and return to your County Clerk.

Overseas citizens and U.S. military personnel can find information on how to register to vote and request an absentee ballot at the Overseas Vote Foundation.