CO
Same-Day Registration
Automatic Registration
Colorado Registration Deadlines
Colorado offers same-day voter registration. You can register and vote on Election Day.
Online
8 days before election
8 days before election
Postmarked by deadline
In-Person
Election Day
Same-day registration available
Upcoming Elections in Colorado
2026 Primary Elections
99 days
Tuesday, June 2, 2026
Online: May 25
Mail: May 25
2026 Midterm Elections
253 days
Tuesday, November 3, 2026
Online: Oct 26
Mail: Oct 26
Official Information
Colorado Voter Registration
Last updated: January 15, 2025
Related Resources
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Visit your state's official election website to register to vote or check your registration status.
Register NowColorado Features
Same-day registration available
Automatic voter registration
Online registration available