How to Vote in Colorado's Presidential Primary

Feb 10, 2020

Presidential Primary ballots for Garfield, Eagle and Pitkin County residents go out in the mail today. KDNK’s Lucas Turner has more details.

Credit Erik Hersman

  Since the start of the century, Coloradans have used a caucus system to nominate their pick for president. This meant that voters had to physically show up to a caucus location on Super Tuesday and only those affiliated with a political party could participate.

But in 2016, Coloradans chose to ditch the caucus system by passing Proposition 107. 

Now, the state will use a primary system. This means all voters including the unaffiliated, will receive presidential primary ballots in the mail. It also means they can mail in their ballot or drop it off at a designated location.

To get more specific, affiliated voters will receive a ballot for their respective party’s primary. Unaffiliated voters will receive ballots for both the Republican and Democratic primary, but they are only allowed to fill out one. Attempting to vote in both primaries will void both ballots.

In addition, voters aged 17 at the time of the primary who will be 18 before the 2020 general election will also receive presidential primary ballots. 

All ballots must be dropped off by 7 pm on Tuesday, March 3rd at any designated Voter Service and Polling Center. Ballots can be dropped off as early as February 24th.

Voters can also participate in person. Early in-person voting starts on Saturday, February 29th, and the official voting day is super Tuesday March 3rd, from 7am to 7pm. 

Colorado residents can check voter registration information at