Colorado county clerks to mail out 2026 primary ballots this week

County clerks in Colorado can begin mailing out ballots to registered voters Monday for the June 30 primary election. 

Voters registered with a political party will only receive the primary ballot for their party. Unaffiliated voters will receive ballots from both the Colorado Democratic and Republican parties and can choose which one to return. 

The Libertarian Party of Colorado blocked unaffiliated voters from participating in the party’s primary election, but unaffiliated voters who want to vote in the Unity Party’s primary may request a ballot from their county clerk. Two Libertarian candidates are running for secretary of state, and two Unity Party candidates are running for governor.

Voters can update their registration through June 22 and still expect to receive a ballot in the mail. Anyone who registers after that will need to request a ballot in-person from their county clerk or at a voter service and polling center if they wish to vote in the primary election. Eligible voters can update their registration through Election Day.  

Coloradans can search for a voter service and polling center or a drop box for mail ballots on the secretary of state’s website. County clerks must receive all ballots by 7 p.m. on Election Day. 

BallotTrax allows Colorado voters to track their ballot from the time it is mailed to them until it is counted. 

As of June 1, Colorado has just over 4 million active registered voters. Slightly more than 50% of those voters are unaffiliated.

Voter turnout in midterm elections is typically lower than in presidential election years.

Candidates who win their party primary will move forward to the general election in November, which will feature races for one U.S. Senate seat, governor, attorney general, secretary of state, treasurer, every one of the 65 state House seats, and 21 of the 35 state Senate seats.

Coloradans can consult Colorado Newsline’s 2026 Voter Guide for information on contested primary races.