54128 leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 65% of adults in 54128 typically vote, near the U.S. average of about 62%. Among adults in 54128, ~27% vote Democratic, ~38% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How 54128 compares
Among zip codes within 15 miles, 54128 leans more Republican than 5 of 9 neighbors.
54128 runs about 15 points more Republican than Wisconsin as a whole.
Politics vary noticeably by block within 54128. The north side runs the most Democratic (D+13) and the southeast side runs the most Republican (R+41), a spread of about 54 points.
Why 54128 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 54128, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 54128 live in densely developed areas, about 18 points below the Wisconsin average of 24%.
Population density and Republican lean
Places with low population density tend to lean Republican; 54128, WI sits below the national average on this measure.
Why turnout in 54128 looks the way it does
Turnout in 54128 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Wisconsin Elections Commission, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.