Primary Information

2018 Primary Election - June 26, 2018

Unaffiliated Voter? Watch this!

Now, we realize this educational video may be a bit confusing if you didn’t see the first one we produced. Check that one out here on our YouTube channel and tell us what you think!

Important Dates

    • If registered with a political party, last day to change party change party affiliation if you want to switch parties
    • If registered as an unaffiliated (sometimes referred to as “independent” voter), last day to update your registration with a party preference IF you know which party’s primary you want to vote in. Otherwise, you will receive both major party ballots in the mail (Democratic and Republican) BUT may only vote and return one.
  • June 4: Ballots mailed to registered voters this week
  • June 4: 22-day Colorado residency deadline
  • June 4: In-person voting available at the Boulder office of the Clerk & Recorder
  • June 18: Last day to request a replacement mail ballot or register to vote and be sent a ballot in the mail
  • June 18: Voter Service Centers open
  • June 26: Election Day, ballots must be received by 7pm

What’s new in 2018?U Choose Campaign Mail in one Ballot graphicChoice happens with you logo

  • Unaffiliated voters are eligible to participate in the Primary Election; Active voters will automatically receive their ballot(s) in the mail
  • Unaffiliated voters who have not indicated a party ballot preference (deadline was May 29) will receive both a Democratic Party ballot and a Republican Party ballot in the mail in one ballot packet. Voters should select, vote, and return only one ballot.

For more information, see Unaffiliated Voters FAQ.

Ballot Content

  • See our Primary Candidate List for the state and local races for both the Democratic and Republican ballots.

Additional Information

Contact Us

Elections Division


303-413-7728 (Fax)


Hours: 8 a.m. – 4:30 p.m. M-F


Boulder: 1750 33rd Street
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Longmont: 529 Coffman Street
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Lafayette: 1376 Miners Drive
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Mailing Address

1750 33rd Street, Suite 200
Boulder, CO 80301