CO

Colorado Voter Registration Guide

Current voter registration requirements, birth certificate ordering information, voter ID rules, deadlines, and official election office links for Colorado.

POC: No current requirementID required
Interactive map of the United States showing proof-of-citizenship law status by state
Active POC Law
POC Law (Not Enforced)
No POC Requirement
Voter ID Requirement
ID is required for in-person voting contexts in Colorado; state guidance also distinguishes registration method deadlines and in-person voter service options through Election Day
Online Registration
Available
Registration Deadline
Colorado voters may register through Election Day; to receive a ballot by mail, online or mail registration must be submitted by the 8th day before Election Day
Proof of Citizenship Law
No current requirement
NoteNo active statewide documentary proof-of-citizenship voter-registration requirement as of Mar 2026. Colorado conducts major elections by mail ballot and supports same-day in-person registration.

What to Do Now

  1. 1Check if you have one of the accepted documents (passport, birth certificate, naturalization certificate)
  2. 2If your name has changed, get a passport in your current legal name
  3. 3Order your birth certificate now if you don't have one
  4. 4Verify your voter registration is current
  5. 5Keep originals safe - the SAVE Act requires originals, not photocopies

Frequently Asked Questions