Important Voting Details — Colorado Primary Election, June 30, 2026

Key Dates & Deadlines

Mark Your Calendar

The Colorado Primary Election is held on Tuesday, June 30, 2026. All times below are Mountain Time.

Now through June 30 — Register to vote and update your registration (online, by mail, in person, or same-day).
By about June 22 — Last safe day to return your ballot by mail. After this, use a drop box or voter service center to be certain it arrives on time.
June 22 – June 30 — Early in-person voting at voter service and polling centers (no excuse required).
Tuesday, June 30 by 7:00 p.m. — Ballots must be received by the county. A postmark does not count. Polls and drop boxes close at 7:00 p.m.

Ways to Vote

How You Can Cast Your Ballot

Colorado is a vote-by-mail state. Every active registered voter is automatically mailed a ballot — but you can also vote in person if you prefer.

By Mail (the standard method) — A ballot is mailed to every active registered voter. Complete it, sign the return envelope, and send it back early.
Ballot Drop Boxes — Official 24/7 drop boxes are open across Douglas County through 7:00 p.m. on Election Day. The fastest, safest way to return your ballot.
Early In-Person Voting — Vote at a voter service and polling center from June 22 through June 30. No excuse required.
In Person on Election Day — Vote at any Douglas County voter service center until 7:00 p.m. on June 30.

Find Drop Boxes & Polling Places

Registering to Vote

Make Sure You're Registered

It may be too late to register for this election

To vote in the June 30 Primary, Colorado law requires you to have been a state resident for at least 22 days before Election Day — since June 8, 2026. If you moved to Colorado after that date, it's too late to register for this election. If you already meet the residency requirement, you can still register in person — including same-day at a voter service center — and vote through 7:00 p.m. MT on June 30.

To register in Colorado you must be a U.S. citizen, a Colorado resident for at least 22 days before the election, and at least 18 years old on or before Election Day. You may not be serving a sentence for a felony conviction.

Online — Register by June 30 at the Colorado Secretary of State's site. You'll need a Colorado driver's license number, Colorado ID number, or the last four digits of your Social Security number.
By Mail — Your completed application must be received by June 30. First-time mail registrants must include a copy of acceptable ID.
In Person / Same-Day — Colorado allows registration through Election Day, including same-day registration at a voter service center.

Register or Check Your Status Mail Registration Form (PDF)

ID Requirements

What to Bring When Voting In Person

If you vote in person in Colorado, you'll need to show ID. If your ID shows your address, that address must be in Colorado. Acceptable forms include:

A valid Colorado driver's license or ID card issued by the Colorado Department of Revenue
A valid U.S. passport
A valid U.S. government or Colorado employee photo ID, or a U.S. military photo ID
A valid pilot's license issued by the FAA
An ID card issued by a federally recognized tribal government
A Medicare or Medicaid card
A certified copy of your U.S. birth certificate, certificate of naturalization, or Certificate of Degree of Indian/Alaska Native Blood
A photo student ID or veteran's ID issued by a Colorado institution or the VA
A current utility bill, bank statement, government check, paycheck, or other government document (dated within the last 60 days) showing your name and address

No ID? You can still cast a provisional ballot. After Election Day, your local election official will determine your eligibility and whether the ballot is counted.

Voting Locations

Official Resources

Need More Help?

For polling locations, drop box sites, and the most up-to-date official information, visit the Colorado Secretary of State. Questions about the campaign? We're happy to help.

Douglas County Elections Colorado Secretary of State Contact the Campaign

This page is provided as a voter-information courtesy. Always confirm dates and locations with the Colorado Secretary of State or the Douglas County Elections office.