Primary Rules
How Wisconsin's Primary Works
Wisconsin uses a Open Primary system
Open Primary
Any registered voter can vote in any party's primary, regardless of their own party affiliation or registration status.
Voter file data: L2 Data · Registration counts: Wisconsin Secretary of State · Updated May 15, 2026
Wisconsin Voter Registration
& Party Affiliation Statistics
Total Registered
4,980,726
Most Active Primary Party
Republican (37.86%)
Independent / NPP
30.95%
Primary Type
Open Primary
At a Glance
Wisconsin at a Glance
Key voter registration statistics · Updated 2026
Registered Voters
4,980,726
across 72 counties
Independent / NPP
30.95%
of registered voters
2024 Turnout
76.7%
of eligible voters
Primary Participation
Primary Ballot Participation by Party
Wisconsin does not register voters by party. The breakdown below is modeled from recent primary ballot history.
Democratic31.2%
Republican37.86%
Independent/Other30.95%
| Party | Registered Voters | % of Total |
|---|---|---|
Democratic | 1,553,783 | 31.2% |
Republican | 1,885,640 | 37.86% |
Independent/Other | 1,541,303 | 30.95% |
Note: Wisconsin does not collect party affiliation at voter registration. These figures are modeled from L2 voter-file analysis of which primary ballot each voter pulled in recent cycles — they reflect primary participation, not party registration.
Turnout
Voter Turnout in Wisconsin
How many eligible Wisconsin residents actually vote?
Recent Elections
| Election | Turnout | Voted |
|---|---|---|
| 2024 General | 76.7% | 3,437,142 |
| 2022 General | 60.2% | 2,673,154 |
| 2020 General | 75% | 3,310,000 |
| 2024 Presidential Primary | 12.1% | 601,296 |
| 2024 State Primary | 26% | 1,200,000 |
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