54138 leans heavily Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 80% of adults in 54138 typically vote, above the U.S. average of about 62%. Among adults in 54138, ~28% vote Democratic, ~52% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How 54138 compares
Among zip codes within 15 miles, 54138 is the least Republican-leaning.
54138 runs about 30 points more Republican than Wisconsin as a whole.
Why 54138 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 54138, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 5% of residents in 54138 live in densely developed areas, about 19 points below the Wisconsin average of 24%.
Population density and Republican lean
Places with low population density tend to lean Republican; 54138, WI sits in the bottom quarter nationally on this measure.
Why turnout in 54138 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 54138 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 67%, about 7 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in 54138 own their home, about 21 points above the U.S. average of 75%. 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.