Note: Due to approval in November 2016 of Proposition 107, Presidential Primary Election, and Proposition 108, Primary Elections, there will be changes to the caucus system as described below. This page will be updated as more information becomes available.


Parties start choosing candidates at caucuses

Colorado political parties hold caucuses in each precinct to begin choosing candidates and platforms (positions on issues).

Voters at a caucus elect:

·         delegates to represent the precinct at the party’s county and district assemblies

·         precinct committee people

First Tuesday in March*

Caucuses, which are open to the public, are usually held on the first Tuesday in March.

*In Presidential election years, parties may choose to hold caucuses on the first Tuesday in February.

To vote at a caucus, make sure you’re:

  • A resident of the precinct for 30 days,
  • Registered to vote at least 29 days before the caucus, and
  • Affiliated with the party holding the caucus at least 2 months before the caucus.You can change your affiliation by logging into your voter registration record on the Secretary of State’s website or going to your County Clerk’s office.

Caucus locations are chosen by parties

Contact the political party with which you are affiliated to find out the time and location of your caucus.

If you need your precinct number, log into your voter registration record on the Secretary of State’s website.

Delegates from caucuses attend County and District Assemblies

County assemblies select county-level candidates who will run in the primary election. They also elect delegates to district assemblies and state convention.

District assemblies cover districts that are larger than a county, but smaller than the whole state. Various district assemblies nominate candidates for the U.S. Congress, the Colorado Legislature, the State Board of Education, the Board of Regents, and District Attorneys.

State Conventions come next

State conventions nominate candidates for statewide offices, such as Governor, who will appear on the ballot in the primary election. They also elect delegates to the national convention.

For more information:

Contact your county political party for more information about your local caucus.

See the Secretary of State’s Caucus FAQ.