Primary Elections
Colorado Primary Elections 2026
Primary date, filing deadlines, key contested races, and what to watch in Colorado ahead of the 2026 general election.
June 30, 2026
Primary Date
None
Runoff / RCV
March 2026
Filing Deadline
Very High — governor open seat
Competitiveness
Key 2026 Primary Races
| U.S. Senate | Michael Bennet (D) up — faces GOP challenger |
| Governor | Jared Polis (D) term-limited — open seat |
| U.S. House | CO-3 (Lauren Boebert seat), CO-8 (Evans), CO-6, CO-7 |
2026 Primary Overview
Colorado has both a competitive Senate race (Bennet re-elect) and an open governor race (Polis term-limited). This makes Colorado a top-tier battleground in 2026. Republican candidates will face competitive primaries for both Senate and governor.