54840 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 80% of adults in 54840 typically vote, above the U.S. average of about 62%. Among adults in 54840, ~25% vote Democratic, ~55% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How 54840 compares
Among zip codes within 15 miles, 54840 leans more Republican than 2 of 4 neighbors.
54840 runs about 36 points more Republican than Wisconsin as a whole.
Politics vary noticeably by block within 54840. The northwest side is the most Republican-leaning (R+45) and the north side is the least Republican-leaning (R+30), a spread of about 15 points.
Why 54840 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 54840. The lean here lands roughly where demographic data alone would predict.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 54840, WI sits above the national average on this measure.
Why turnout in 54840 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 54840 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 64%, above 58% 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.