Presidential Primary Election information & more

Official Elections Correspondence -- Boulder County, Colorado

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Voter and Election Information

Boulder County Voters:

Ballots will be mailed to active registered Democrats, Republicans, and Unaffiliated voters beginning February 12 for the presidential primary election. If you would like to confirm your ballot mailing address or your party affiliation, please take action now. It only takes a minute:

Check Voter Registration Now

Moved out of Boulder County, but still in Colorado?  Anyone in Colorado can update their registration on the Secretary of State's website (same link as above button).

Moved out of state? If you have moved out of Colorado, don't just unsubscribe! Please keep our voter lists accurate by taking a quick moment to withdraw your CO registration and then register in your new state!

I voted Sticker

Presidential Primary Basics:

  • The Presidential Primary is March 5 and ballots begin to mail February 12.
  • Registered Democrats will receive only the Democratic Party ballot. For candidates names, see the Democratic sample ballot.
  • Registered Republicans will receive only the Republican Party ballot. For candidate names, see the Republican sample ballot.
  • Note that ballots are printed in early January and some candidates may drop out but still be listed on the ballot.
  • Minor parties do not hold presidential primaries.  
  • February 12 is the deadline to switch party affiliation if you want to vote in a different primary. However, due to mailing deadlines, we recommend changing your party affiliation earlier in order to receive the correct ballot.
  • By law, unaffiliated voters will be mailed both major party (Dem and Rep) ballots but can only vote and return one ballot. See Unaffiliated FAQ for more details.

For more information, see our Election Information page.


Important Dates:

Happening now:

  • Voters who need to vote early may stop in to receive their mail ballot at the Boulder County Clerk & Recorder's office at 1750 33rd Street in Boulder between 8 a.m. - 5 p.m. Mon-Thurs.

February 12

  • Ballots mailed to eligible Democrats, Republicans, and Unaffiliated voters.
  • Deadline to switch party affiliation if you want to vote in a different primary (sooner is better though!)
  • All 24-Hour Mail Ballot Drop Boxes open.

February 26

  • Last day to register and still be sent a ballot in the mail.
  • Last recommended date to return your ballot by mail (otherwise, use a drop box).
  • Vote Centers open.
  • Ballot-to-Go service begins.

Feb 28 / March 2 & 4

Election Tours - Save the Date! RSVP link will be in next email to voters in February.

  • Weds, Feb. 28: 12:30 p.m.
  • Sat, March 2: 10:30 a.m.
  • Mon, March 4: 1 p.m.

March 5
Election Day

Ballot drop-off and voting services available 7 a.m. to 7 p.m. Ballots must be received by 7 p.m. to be counted.

Colorado does not have a registration deadline. You can register to vote up to and including Election Day.