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Colorado elections in 2026

This page lists Colorado statewide election dates, voter registration deadlines, absentee and early voting timelines, poll hours, and official election resources.

Last reviewed: July 26, 2026. Colorado election dates and voting deadline information is summarized from curated election data and official source links listed on this page. Confirm dates, deadlines, and local procedures with your state or local election office.

At a glance​

Register to vote in Colorado​

Start with the official Colorado voter registration page. The section below highlights registration methods and the deadlines tied to the next statewide election on this page.

Colorado voters may register online, by mail, or in person. Registration deadlines may vary by election type or method where noted. Same-day registration may also be available where noted.

Upcoming registration deadlines​

  • October 12, 2026 — Voter Registration Deadline In Person: Submit an application through a voter registration drive no later than 22 days before Election Day. Note: Be aware that this date falls on a holiday -Columbus Day, 2nd Monday in October- and may be subject to change.
  • October 26, 2026 — Voter Registration Deadline By Mail, Fax or email attachment: Submit an application through the mail, at a voter registration agency, or at a local driver's license examination facility through the 8th day before Election Day.
  • October 26, 2026 — Voter Registration Deadline Online: Colorado enables residents to register through their online voter registration portal. Register to vote or update your voter registration online at https://www.GoVoteColorado.gov through the 8th day before Election Day.
  • November 3, 2026 — Election Day Voter Registration Deadline: Qualified individuals may register to vote at the polling place on election day at all elections starting Early voting period through Election Day. C. R. S. A. § 1-2-217. 7.

Online​

Colorado enables residents to register through their online voter registration portal. Register to vote or update your voter registration online at https://www.GoVoteColorado.gov through the 8th day before Election Day

Eligibility or requirements

  • Must meet state voter registration eligibility requirements.

Deadlines

  • Online registration must be completed 8 days before Election Day.

  • Register online

By Mail​

Submit an application through the mail, at a voter registration agency, or at a local driver's license examination facility through the 8th day before Election Day

Deadlines

In Person​

Submit an application through a voter registration drive no later than 22 days before Election Day.

Deadlines

Special registration options​

Same Day Registration: Available

Qualified individuals may register to vote at the polling place on election day at all elections starting Early voting period through Election Day. C. R. S. A. § 1-2-217. 7

Military Overseas: Available

All military and overseas voters must be registered to vote in order to obtain a ballot. UOCAVA voters can register by completing a Federal Post Card Application (FPCA).

Additional registration notes​

Other Registration Option

The National Mail Voter Registration Form may also be available where accepted.

Absentee and early voting in Colorado​

These absentee and early voting deadlines are tied to the next statewide election listed on this page. Local procedures can vary, so confirm final details with your local election office.

  • October 9, 2026 — First day that mail ballots may be mailed to voters: First day that mail ballots for the 2026 General Election may be mailed to voters, except for UOCAVA voters. (Not sooner than 22 days before the election or the previous business day if the 22 day before the election falls on a state or federal holiday)
  • October 19, 2026 — All-Mail voting begins: Every Colorado voter receives a ballot in the mail, but you can still vote in person at a Voter Service and Polling Center if you'd like. In-person voting voting begins at least 7 days before Election Day. Voter service and polling centers must be open 15 days before an election.
  • October 26, 2026 — Voter Registration Deadline By Mail, Fax or email attachment: Submit an application through the mail, at a voter registration agency, or at a local driver's license examination facility through the 8th day before Election Day.
  • November 3, 2026 — All-Mail voting ends: In-person voting ends on Election Day.
  • November 3, 2026 — Election Day Voter Registration Deadline: Qualified individuals may register to vote at the polling place on election day at all elections starting Early voting period through Election Day. C. R. S. A. § 1-2-217. 7.

Voter ID requirements in Colorado​

Review the current voter ID rules before you vote: Colorado voter ID requirements.

Colorado election dates for 2026​

Primary Election — June 30, 2026​

State and Congressional primary elections are held on the last Tuesday in June of even-numbered years to nominate candidates of political parties to be voted for at the succeeding general election.

Important dates​

  • June 8, 2026 — First day that mail ballots may be mailed to voters: First day that mail ballots for the June 30th Primary Election may be mailed to voters, except for UOCAVA voters. (Not sooner than 22 days before the Primary Election, now applies to unaffiliated voters
  • June 8, 2026 — Last day for voters to change party affiliation: Last day for voters who are affiliated with a political party to change or withdraw their affiliation if they wish to vote in a different party's primary election. (Up to the 22nd day before the Primary Election or day after if 22nd day is a state or federal holiday)
  • June 8, 2026 — Voter Registration Deadline In Person: Submit an application through a voter registration drive no later than 22 days before Election Day.
  • June 10, 2026 — Last day to post polling location signs: Last day to post polling location signs for the June 30th Primary Election. (At least 20 days before the election)
  • June 12, 2026 — Last day to send out initial mail ballots: Last day to send out initial mail ballots for the June 30th Primary Election. (No later than 18 days before the Primary Election)
  • June 15, 2026 — All-Mail voting begins: Every Colorado voter receives a ballot in the mail, but you can still vote in person at a Voter Service and Polling Center if you'd like. In-person voting voting begins at least 7 days before Election Day. Voter service and polling centers must be open 15 days before an election.
  • June 22, 2026 — Voter Registration Deadline By Mail, Fax or email attachment: Submit an application through the mail, at a voter registration agency, or at a local driver's license examination facility through the 8th day before Election Day.
  • June 22, 2026 — Voter Registration Deadline Online: Colorado enables residents to register through their online voter registration portal. Register to vote or update your voter registration online at https://www.GoVoteColorado.gov through the 8th day before Election Day.
  • June 30, 2026 — All-Mail voting ends: In-person voting ends on Election Day.
  • June 30, 2026 — Election Day Voter Registration Deadline: Qualified individuals may register to vote at the polling place on election day at all elections starting Early voting period through Election Day. C. R. S. A. § 1-2-217. 7.

General Election — November 3, 2026​

November General election is held the Tuesday after the first Monday of November in every even- numbered year.

Important dates​

  • October 9, 2026 — First day that mail ballots may be mailed to voters: First day that mail ballots for the 2026 General Election may be mailed to voters, except for UOCAVA voters. (Not sooner than 22 days before the election or the previous business day if the 22 day before the election falls on a state or federal holiday)
  • October 12, 2026 — Voter Registration Deadline In Person: Submit an application through a voter registration drive no later than 22 days before Election Day. Note: Be aware that this date falls on a holiday -Columbus Day, 2nd Monday in October- and may be subject to change.
  • October 14, 2026 — Last day to post polling location signs: Last day to post polling location signs for the 2026 General Election. (At least 20 days before the election)
  • October 19, 2026 — All-Mail voting begins: Every Colorado voter receives a ballot in the mail, but you can still vote in person at a Voter Service and Polling Center if you'd like. In-person voting voting begins at least 7 days before Election Day. Voter service and polling centers must be open 15 days before an election.
  • October 26, 2026 — Voter Registration Deadline By Mail, Fax or email attachment: Submit an application through the mail, at a voter registration agency, or at a local driver's license examination facility through the 8th day before Election Day.
  • October 26, 2026 — Voter Registration Deadline Online: Colorado enables residents to register through their online voter registration portal. Register to vote or update your voter registration online at https://www.GoVoteColorado.gov through the 8th day before Election Day.
  • November 3, 2026 — All-Mail voting ends: In-person voting ends on Election Day.
  • November 3, 2026 — Election Day Voter Registration Deadline: Qualified individuals may register to vote at the polling place on election day at all elections starting Early voting period through Election Day. C. R. S. A. § 1-2-217. 7.

Official Colorado election resources​

Use these official and state-specific resources to confirm dates, registration rules, absentee voting requirements, voter ID rules, and local procedures.

What may vary locally​

Election dates, voter registration deadlines, early voting, absentee voting, and voting hours apply to statewide elections in most cases. However, check with your Town Clerk for the hours of voting, and voter registration deadlines as they vary by town. Please be advised that these dates are updated regularly but are subject to scheduling changes at the local level.