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.
Registration counts: Voter Count · Updated November 15, 2026
Colorado Voter Registration
& Party Affiliation Statistics
Total Registered
3,943,363
Largest Party
Independent (50.78%)
Independent / NPP
50.78%
Primary Type
Semi-Open Primary
All data provided by
(opens votercount.ai in a new tab)The only AI tool connected to L2’s industry-leading national voter file.
Ask about any county, age group, or district in Colorado, in plain English, and get answers in seconds.
At a Glance
Colorado at a Glance
Key voter registration statistics · Updated 2026
Registered Voters
3,943,363
across 64 counties
Independent / NPP
2.0M
50.78% of registered
2024 Turnout
73.4%
of eligible voters
53.87% of voters in Broomfield County are registered independents, compared with 50.78% across Colorado. That's the highest share of any Colorado county with at least 50,000 voters.
Answered directly from the voter file with Voter Count
Registration
Voter Registration by Party
How many registered Democrats, Republicans, and Independents are in Colorado?
Democratic24.7%
Republican22.2%
Independent50.8%
Other2.4%
| Party | Registered Voters | % of Total |
|---|---|---|
Democratic | 972,859 | 24.7% |
Republican | 873,584 | 22.2% |
Independent | 2,002,266 | 50.8% |
Other | 94,654 | 2.4% |
Turnout
Voter Turnout in Colorado
How many eligible Colorado residents actually vote?
Recent Elections
| Election | Turnout | Voted |
|---|---|---|
| 2024 General | 73.4% | 3,241,120 |
| 2022 General | 58.4% | 2,540,666 |
| 2020 General | 76.7% | 3,295,666 |
| 2024 Presidential Primary | 39.0% | 1,558,640 |
| 2024 State Primary | 25.5% | 988,630 |
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All data provided by
(opens votercount.ai in a new tab)The only AI tool connected to L2’s industry-leading national voter file.
Ask about any county, age group, or district in Colorado, in plain English, and get answers in seconds.