Denver Voting Deadline Set for June 30 Colorado Primary

Denver voters must return their primary ballots by 7 p.m. on June 30 ^[1].

The deadline marks the final opportunity for residents to influence the primary selection process in Colorado. Because the state relies heavily on mail-in voting, ensuring ballots are received on time is critical for legal certification of the results.

Official mailing of primary ballots began on June 8 ^[2]. Since that date, voters have had the opportunity to cast their votes via mail or through designated drop-off locations. The city has rolled out voting hubs to facilitate the process as the countdown to the deadline continues ^[3].

To be counted, all ballots must be submitted by the 7 p.m. cutoff on June 30 ^[1]. This deadline applies across the city, requiring voters to use official drop boxes or voting centers if they have not already mailed their documents. The primary election deadline is strictly set for June 30, 2026 ^[4].

Election officials said the timeline is important to avoid disenfranchisement. Voters who miss the window cannot have their ballots counted, regardless of when the ballot was postmarked. The use of voting hubs is intended to provide a steady stream of access for those who prefer in-person submission over the postal service ^[3].