61478 leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 62% of adults in 61478 typically vote, near the U.S. average of about 62%. Among adults in 61478, ~17% vote Democratic, ~45% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How 61478 compares
Among zip codes within 15 miles, 61478 leans more Republican than 7 of 12 neighbors.
61478 runs about 57 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61478 is one of the few Republican-leaning pockets.
Why 61478 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 61478, not a ranked or complete list of what matters most.
61478 votes against the grain of Illinois. Illinois leans Democratic overall, while 61478 runs about 57 points more Republican. Rural areas with a high white share vote Republican. Non-Hispanic white share in 61478 is about 96%, well above similar-sized zip codes (around 80%). A high family-household share predicts Republican voting, and about 82% of households in 61478 are family households, above 95% of zip codes.
Population density and Republican lean
Places with low population density tend to lean Republican; 61478, IL sits in the bottom quarter nationally on this measure.
Why turnout in 61478 looks the way it does
Turnout in 61478 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 Illinois State Board of Elections, 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.