53103 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About more than 99% of adults in 53103 typically vote, above the U.S. average of about 62%. Among adults in 53103, ~32% vote Democratic, ~72% Republican, and ~-4% don't vote. The map below shows estimated turnout by block group.
How 53103 compares
Among zip codes within 15 miles, 53103 leans more Republican than 32 of 34 neighbors.
53103 runs about 36 points more Republican than Wisconsin as a whole.
Why 53103 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 53103, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 83% of residents in 53103 drive to work alone, about 9 points above the U.S. average of 74%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 53103, WI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 53103 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 53103 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 74%, about 14 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in 53103 own their home, compared to around 78% in nearby zip codes. High high-school completion lines up with higher turnout, and about 96% of adults in 53103 have completed high school, above 84% of zip codes. 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.