This June, the Democratic and Republican parties are holding primaries. Prior to the primaries, the parties hold caucuses to help determine who is selected for the ballot. Minor parties have until later in the spring to notify the state on whether they are holding a primary election. We will update this page with information if any minor parties (Green, Libertarian, etc.) are holding an election.
June 30, 2026 Primary Election Information
Key Details
- Ballot Information: Registered Democrats will receive only the Democratic Party ballot. Registered Republicans will receive only the Republican Party ballot.
- Unaffiliated voters will be mailed both major party ballots (Democratic and Republican), but can only vote and return one ballot. More information for Unaffiliated voters will be available later this spring.
- No Registration Deadline: Colorado does not have a registration deadline. Eligible voters can register and vote up to and including Election Day.
- When is my ballot due? Ballots must be received no later than 7 p.m. on Election Day.
- Interested in working with us during elections? Check out our Temporary Election Positions page for information and to fill out our interest form!
- Got more questions? Read through our Elections FAQ, or contact us at vote@bouldercounty.gov.
More Resources
- 2026 Secretary of State Election Calendar — Calendar of statutory election-related dates.
- More resources will be posted for the 2026 Primary Election as they become available.
Election Events
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Events
List of events in Photo View
Contact Us
Elections Division
7:30 a.m. - 5 p.m.
Monday - Thursday
Closed Fridays
Boulder County Elections Homepage
vote@bouldercounty.gov
Phone: 303-413-7740
Fax: 303-413-7728
