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Your Guide to the 2024 Colorado Primaries

Posted on June 5, 2024   |   Updated on September 30, 2025
Peyton Garcia

Peyton Garcia

two people cast their votes at an in-person polling station

Time to vote! (Hill Street Studios / Getty Images)

Colorado’s primary elections are officially underway, and registered voters have just three weeks to cast their votes. Here’s the when, how, and where to get it done 🗳️✅

Important Dates

Monday, June 3: Ballots mailed out and ballot boxes open

Monday, June 10: In-person voting begins at some polling stations

Monday, June 17:

  • Last day to register to vote if you want your ballot mailed to you. (After this you’ll have to pick up your ballot in person.)
  • Last day to mail your ballot back. (After this you’ll have to drop it off in person.)
  • All in-person voting stations open

Tuesday, June 25: Election Day! Votes must be cast by 7 p.m. (See this map of ballot boxes and polling stations.)

What’s On the Ballot

Voters will be deciding which Republican and Democratic candidates will advance to the November ballot for races across the state. (Unaffiliated voters will receive both Republican and Democratic ballots, but they can only submit one.)

U.S. Congress

All eight of Colorado’s congressional districts have candidates on the ballot — meet the major-party contenders — but districts 3, 4, and 5 have wide open seats. Not sure which district you’re in? Find out here.

State Legislature

Seven incumbent state lawmakers are defending their seats — most notably Tim Hernández in House District 4, and Elisabeth Epps in House District 6.

In Denver

Two Dems are vying for the position of district attorney — John Walsh v. Leora Joseph.

Vote Confidently

City Cast

Is This the Wildest Primary Season Yet?

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