Independent site. Not affiliated with any government or election office. For official information, visit coloradosos.gov/pubs/elections (opens in a new tab) or vote.gov (opens in a new tab).

voteinCO
Voter Guide - nonpartisan

Voting in Colorado, November 3, 2026

Next deadline: Voter Service and Polling Centers open Monday, October 19, 2026

Check your registration (opens in a new tab) Register or update your registration (opens in a new tab)
Tue, Nov 3Election Day
39days until Election Day
7 a.m. to 7 p.m.poll hours, local time

This guide links to official sources and lists key dates we've checked by hand. Last verified: September 25, 2026. Always confirm with coloradosos.gov/pubs/elections (opens in a new tab) before you act. We are not an election authority.

Key dates

  1. Online and mail registration deadline

    Monday, October 26, 2026

    Register or update by this date online at GoVoteColorado.gov or by mail to be mailed a ballot. After that, you can still register and vote in person at a Voter Service and Polling Center through 7 p.m. on Election Day.

    Source: Colorado Secretary of State, 2026 Election Calendar (opens in a new tab)

  2. Mail ballot return deadline

    Tuesday, November 3, 2026, 7 p.m.

    Your county clerk must receive your ballot by 7 p.m. on Election Day; postmarks do not count. Ballots are mailed Friday, October 2 to Friday, October 9, 2026. The state suggests mailing yours back by Monday, October 26, 2026; after that, use a drop box or Voter Service and Polling Center.

    Source: Colorado Secretary of State, Mail-in Ballots FAQs (opens in a new tab)

  3. Election Day poll hours

    Tuesday, November 3, 2026, 7 a.m. to 7 p.m.

    If you are in line by 7 p.m., you can still vote. Voter Service and Polling Centers also offer same-day registration.

    Source: Colorado Secretary of State, 2026 Election Calendar (opens in a new tab)

Official links

Ask about an ad