Elections
Colorado 2026 Primary Election: Date, Rules & What to Know
The Colorado 2026 congressional primary is June 30, 2026. General Election Day is November 3, 2026.
Competitive U.S. House Races
Colorado has 1 U.S. House district rated a toss-up for 2026 (rating: Cook Political Report (June 2026)). These are among the seats most likely to decide control of the House.
CO-8
Toss-upIncumbent: Gabe Evans (R)
Primary June 30, 2026.
Primary Election · June 30, 2026
General Election · November 3, 2026
What's on the Colorado 2026 Ballot
U.S. House of Representatives
All U.S. House seats in Colorado are on the 2026 ballot. Every House member runs for re-election every two years. View Colorado representatives →
U.S. Senate — Class II Seat
Colorado's Class II Senate seat is up for election in 2026. The current senator is John Hickenlooper (D). Class II senators were last elected in 2020 and serve six-year terms.
Colorado's Primary System: Partisan Semi-Open Primary
Colorado holds separate party primaries. Voters registered with a party vote in that party's primary. Voters registered as independent or unaffiliated may choose which party's primary to vote in. You may only vote in one party's primary.
Colorado 2026 Election Key Dates
| June 30, 2026 | Primary Election |
| October 2026 | Voter registration deadlines (check your state) |
| November 3, 2026 | General Election |
| January 3, 2027 | 120th Congress convenes |
Voter Registration in Colorado
Registered party members vote in their own party's primary. Voters registered as independent or unaffiliated may choose which party's primary to vote in. Registration deadlines vary — most states require registration 15–30 days before the primary, though some offer same-day registration.
Check your registration status and find your polling place at vote.gov.
See All State Primary Dates
Compare Colorado's primary to other states' 2026 schedules.
Sources
Frequently Asked Questions
When is the Colorado primary election in 2026?
The Colorado 2026 congressional primary is June 30, 2026. The general election is November 3, 2026.
Can I vote in the Colorado primary if I'm not registered with a party?
Registered party members vote in their own party's primary. Voters registered as independent or unaffiliated may choose which party's primary to vote in.
What is on the Colorado 2026 primary ballot?
All U.S. House seats in Colorado are on the 2026 primary ballot. Additionally, the U.S. Senate seat (Class II) is up for election. The current senator is John Hickenlooper (D). Many states also hold primaries for governor and state legislature on the same day.
What type of primary does Colorado use?
Colorado holds separate party primaries. Voters registered with a party vote in that party's primary. Voters registered as independent or unaffiliated may choose which party's primary to vote in. You may only vote in one party's primary.
When is the Colorado voter registration deadline for the 2026 primary?
Voter registration deadlines vary but are typically 15–30 days before the primary. Check the Colorado Secretary of State website or vote.gov for the exact deadline.
When is the Colorado general election in 2026?
The 2026 general election is on Tuesday, November 3, 2026. This date is the same for all 50 states — it is always the first Tuesday after the first Monday in November in even-numbered years.