Voter Registration Deadline: 29 days before the election.
** If the application is received in the mail without a postmark, it must be received within 5 days of the close of registration
Secretary of State Website
- Be a citizen of the United States
- Be a resident of Colorado 30 days prior to election
- Be 18 years old on or before election day
- Not be confined as a prisoner or serving any part of a sentence under mandate
State Election Website