This year’s filing deadline for candidates running for the U.S. House of Representatives in Colorado was March 18, 2026.
This year has the second-most contested primaries since 2014. In total, seven primaries — five Democratic and two Republican — are contested this year. In total, there were six contested primaries in 2024, eight in 2022, two in 2020, six in 2018, four in 2016, and three in 2014.
Two incumbents — Reps. Diana DeGette (D) and Jeff Hurd (R) — are running in those contested primaries. There was one incumbent in contested primaries in 2024, four in 2022, one in 2020, two in 2018, three in 2016, and two in 2014.
The 1st, 3rd, and 8th Congressional Districts have attracted the most candidates, with 4 each:
- DeGette, two other Democrats, and one Republican are running for the 1st Congressional District.
- Hurd, one other Republican, and two Democrats are running for the 3rd Congressional District.
- Rep. Gabe Evans (R) and three Democrats are running for the 8th Congressional District.
No districts are open this year. There were two open districts in 2024, two in 2022, none in 2020, one in 2018, none in 2016, and one in 2014.
Twenty-five candidates — 15 Democrats and 10 Republicans — are running for Colorado’s eight congressional districts. That’s 3.1 candidates per district. There were 3.9 candidates per district in 2024, 3.8 in 2022, 2.3 in 2020, 3.4 in 2018, 2.6 in 2016, and 2.7 in 2014. Colorado had eight congressional districts in the 2026, 2024, and 2022 election cycles. It had seven congressional districts in all other cycles from 2014 to 2020.
Candidates filed to run in the Republican and Democratic primaries in all eight districts, meaning no districts are guaranteed to either party.
Colorado is holding U.S. House primaries on June 30, 2026.
In Colorado, primary elections are determined via plurality vote, meaning that the candidate with the highest number of votes wins even if they did not win an outright majority of votes cast.
