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: L2 Data · Updated August 14, 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
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?
Democratic24.7%
Republican22.2%
Independent50.7%
Other2.4%
| Party | Registered Voters | % of Total |
|---|---|---|
Democratic | 991,920 | 24.7% |
Republican | 894,209 | 22.2% |
Independent | 2,038,329 | 50.7% |
Other | 97,976 | 2.4% |
votercount.aiNew · Betain collaboration with L2 Data
The numbers above are just the start.
Ask the voter file anything — in plain English — and get real answers back, not a spreadsheet.
Compare Gen Z and Boomer party registration in Florida.
Gen Z is far more likely to register Non-Partisan than Boomers — it’s their single largest category.
Party registration · Florida
Share of each generation
Republican
Boomers44.8%
Gen Z30.6%
Non-Partisan
Boomers20.4%
Gen Z33.5%
Democratic
Boomers32.3%
Gen Z30.3%
Boomers lean heavily Republican — nearly 45% are registered Republican, the dominant party by a wide margin.Gen Z is far more likely to be Non-Partisan (33.5%) than Boomers (20.4%).
Join 1,200+ already on the early-access list.
Early-access updates only. We won’t add you to any other list.
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 |
Independent voters deserve a voice.
Join thousands of Americans fighting for nonpartisan election reform. Get data-driven updates, not partisan spin.