2026 Election Calendar
Primary and general election dates, voter registration deadlines, and registration links for all 50 states.
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Register to vote, check deadlines, and get a first-time voter checklist for your state.
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Your personalized sample ballot for CO: candidates, ballot measures, and local races.
Colorado
Voter Registration
Deadline for November 3 general: October 26, 2026 (8 days before)
Same-day registration availableYou can register and vote on Election Day at your polling place.
Elections
Colorado Primary Election
Tuesday, June 30, 2026
U.S. House, U.S. Senate, Governor, statewide offices
Colorado General Election
Tuesday, November 3, 2026
U.S. House, U.S. Senate, Governor, statewide offices
+ Add to Google CalendarWho's Running
U.S. Senate
General Election: November 3, 2026
U.S. House Races
Filed candidates from FEC records. Full position profiles not yet available for House races.
Colorado — District 1
General Election: November 3, 2026
Christopher Oldfield
Democratic
