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Issue Briefs

Overview of Primary Election Laws (18-07)

Elections & Redistricting

In 2016, voters approved Proposition 107 and Proposition 108, which reestablished a presidential primary in Colorado and allowed unaffiliated voters to participate in political party primary elections. Subsequently, the General Assembly enacted Senate Bill 17-305, which made modifications to state law to implement these measures, and Senate Bill 18-233, which made additional changes to some of the provisions concerning unaffiliated voters voting in primary elections. The Secretary of State also promulgated rules to address changes to the primary election laws prior to the 2018 election cycle. This issue brief provides an overview of presidential primaries and participation by unaffiliated voters in primary elections.

Email addresses for the Colorado legislature have changed from the domain to the domain on December 1, 2022. Details
The effective date for bills enacted without a safety clause (unless otherwise specified) is August 7, 2023. Details
The 2023 Ballot Information Booklet (Blue Book) is now available. Details