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Registration counts: L2 Data · Updated July 17, 2026

Colorado Voter Registration

& Party Affiliation Statistics

Total Registered
4,022,434
Largest Party
Independent (50.67%)
Independent / NPP
50.67%
Primary Type
Semi-Open Primary
OverviewRegistrationPrimary RulesTurnout
At a Glance

Colorado at a Glance

Key voter registration statistics · Updated 2026

Registered Voters
4,022,434
across 64 counties
Independent / NPP
2.0M
50.67% of registered
2024 Turnout
73.4%
of eligible voters
Registration

Voter Registration by Party

How many registered Democrats, Republicans, and Independents are in Colorado?

24.7%
22.2%
50.7%
Democratic24.7%
Republican22.2%
Independent50.7%
Other2.4%
PartyRegistered Voters% of Total
Democratic
991,92024.7%
Republican
894,20922.2%
Independent
2,038,32950.7%
Other
97,9762.4%
Primary Rules

How Colorado's Primary Works

Colorado uses a Semi-Open Primary system

⚖
Semi-Open Primary
Voters don't have to publicly declare a party affiliation, but they must request a specific party's ballot at the polling place.
How It Works
Similar to open primaries, but the party whose ballot you request may be recorded. Some states allow parties to restrict their primaries to registered members, creating a hybrid system.
IVP's Position
Marginally better access for independents, but the party-based structure remains the core limitation.
See all primary systems by state →
Turnout

Voter Turnout in Colorado

How many eligible Colorado residents actually vote?

Recent Elections
ElectionTurnoutVoted
2024 General73.4%3,241,120
2022 General58.4%2,540,666
2020 General76.7%3,295,666
2024 Presidential Primary39.0%1,558,640
2024 State Primary25.5%988,630
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