The Colorado Democratic Primary Election is Tuesday, June 30, 2026. Ballots were mailed to eligible voters beginning June 8, and all voted ballots must be received by your county clerk or dropped off at an official ballot drop box by 7:00 p.m. on Election Day. Postmarks do not count.
Who Can Vote?
- Registered Democrats can vote in the Democratic Primary.
- Unaffiliated voters will receive both Democratic and Republican primary ballots and may choose which primary to participate in – but can only return one ballot. If both ballots are returned, neither will be counted.
Check Your Voter Registration
Before you vote, make sure your registration and mailing address are up to date.
Check or update your voter registration:
GoVoteColorado.com – Check Registration Status
Colorado voters can register online, update their registration, or register in person through Election Day.
Find Your Ballot Drop Box or Voting Center
Colorado offers dozens of secure 24-hour ballot drop boxes and in-person voting centers across the state.
Find your nearest ballot drop box or voting center:
GoVoteColorado.com – Find a Drop Box or Voting Center
You can:
- Return your completed ballot at any official drop box in your county.
- Vote in person at a Voter Service and Polling Center.
- Obtain a replacement ballot, if needed.
Important Election Dates
June 8 – Ballots begin mailing to voters
June 22 – Voting centers begin opening in counties across Colorado
June 30 – Election Day – ballots due by 7:00 p.m.
