54103 leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 57% of adults in 54103 typically vote, near the U.S. average of about 62%. Among adults in 54103, ~17% vote Democratic, ~41% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 54103 compares
Among zip codes within 15 miles, 54103 leans more Republican than 2 of 3 neighbors.
54103 runs about 40 points more Republican than Wisconsin as a whole.
Why 54103 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 54103, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 3% of residents in 54103 live in densely developed areas, about 21 points below the Wisconsin average of 24%. Low college attainment predicts Republican voting, and 54103 sits in the bottom quarter (about 15%, below 83% of zip codes).
Population density and Republican lean
Places with low population density tend to lean Republican; 54103, WI sits in the bottom quarter nationally on this measure.
Why turnout in 54103 looks the way it does
Turnout in 54103 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.