Election Information Banner

Election Information

2020 March Presidential Primary, June Primary, and General Elections – Dates & Details

Colorado Presidential Primary — March 3, 2020

Colorado will hold its first Presidential Primary Election in two decades on March 3, 2020 – Super Tuesday! Political parties still hold party caucuses in March (check your local party website) and Colorado will still have a primary for statewide and local candidates in June. But ballots for the stand-alone Presidential Primary are mailed to voters beginning February 10. Here is what you need to know to participate:

  • Presidential primaries in Colorado are only held by the Democratic and Republican Parties. You must be registered as a Democrat, Republican, or Unaffiliated to participate.
  • Registered Democrats will receive only the Democratic Party ballot. Registered Republicans will receive only the Republican Party ballot.
  • Unaffiliated voters will be mailed both party ballots but can only vote and return one.
  • ***NEW*** 17-year-olds who will turn 18-years-old by the General Election, Tuesday, November 3, 2020 – Can now VOTE in Primaries!
  • There is no registration deadline. You can register and vote up to and including Election Day. Register online by February 24 to have a mail ballot sent to you. After the 24th, you can visit a Voter Service Center to register & vote in-person.
  • Replacement Ballots – February 24 is the deadline for requesting a new mail ballot be sent to you. If you damaged your ballot and need a new one, call the Elections Office at 303-413-7740 between 8 a.m. – 4:30 p.m. (Monday-Friday) to request a new one. If you did not receive a ballot, call us to verify your address and request a replacement ballot. After February 24, you can visit any Voter Service Center to request a ballot in-person.
  • Complete Ballot ContentEnglish: Democratic Sample Ballot or Republican Sample Ballot; Spanish: Democratic Sample Ballot or Republican Sample Ballot
    • Note: There are no certified write-in candidates for either party for president.
    • Note: Ballot content was finalized on January 3. Candidates who withdrew after this date will still have their name listed on the ballot. For more details, see this Secretary of State press release.
      1. As of 2/18, two candidates have officially withdrawn from the 2020 Presidential Primary Election in Colorado. In order to withdraw, a candidate must file paperwork with the Office of the Secretary of State. Withdrawn candidates will not be reported in results. Votes for these candidates are not valid votes.
      2. We are obligated to report results for all other candidates. This includes any candidates that may have made public announcements that they are ceasing to campaign or have withdrawn from the primary, but have not taken formal steps to end their candidacy in the State of Colorado.
  • Unaffiliated Voter Frequently Asked Questions
  • Election Information in Spanish (Información para votantes hispanohablantes)

Key Dates & Events:

  • Saturday, Jan 18 – Ballots mailed/transmitted to overseas and military (UOCAVA) voters.
  • Monday, Feb 3 – Last day for voters who are affiliated with a political party to change or withdraw their affiliation if they wish to vote in a different party’s primary election for the March 3 Presidential Primary Election. It is also the last day for Unaffiliated voters to specify in their voter registration a ballot preference (optional). Otherwise, they will receive both party ballots, but can only vote and return one.
  • Monday, Feb 10 – Ballots mailed to all Boulder County voters (non-overseas voters).
  • Thursday, Feb 20 – 5:30 p.m. – Sanitas Brewing in Boulder – Free & open to the public. Click here to RSVP. Presentation on the upcoming 3 elections – Presidential Primary Election, June 30 Primary, and General Election plus information on election security, voter stats, and more. Presentation will likely be 30-45 minutes with questions. Snacks and non-alcoholic beverages served. Beers for purchase.
  • Monday, Feb 24 – Last day to register and still be mailed a ballot / last day to request a replacement ballot be mailed to you. Note: Colorado DOES NOT have a registration deadline. Eligible voters can register and vote on the same day at any Voter Service Center. See eligibility requirements.
  • Monday, Feb 24 – Voter Service Centers open.
  • Friday, Feb 28 – 12:30pm – 2 p.m. Election Open House & Ballot Processing Center Tours (tours run every 30 minutes). Click here to RSVP.
  • Monday, March 2 – 4:30pm – 6:00 p.m. Election Open House & Ballot Processing Center Tours (tours run every 30 minutes). Click here to RSVP.
  • Tuesday, March 3 – Presidential Primary – Last day to vote

Helpful Resources & Other Information:

More information will be posted throughout the election period regarding the Presidential Primary.

Primary Election — June 30, 2020

  • Primary election for candidates for U.S. Senate, Congressional, State, and Local. Details later in spring.

General Election — November 3, 2020

  • Details will be posted after the June 30 Primary Election.

Contact Us

Elections Division


303-413-7728 (Fax)


Hours: 8 a.m. – 4:30 p.m. M-F


Boulder: 1750 33rd Street
Map & Directions

Longmont: 529 Coffman Street
Map & Directions

Lafayette: 1376 Miners Drive
Map & Directions

Mailing Address

1750 33rd Street, Suite 200
Boulder, CO 80301