62378 is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 83% of adults in 62378 typically vote, above the U.S. average of about 62%. Among adults in 62378, ~16% vote Democratic, ~67% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How 62378 compares
Among zip codes within 15 miles, 62378 is the most Republican-leaning.
62378 runs about 73 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62378 is one of the few Republican-leaning pockets.
Why 62378 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 62378, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 5% of residents in 62378 live in densely developed areas, about 27 points below the Illinois average of 33%. A high white share with below-average college attainment predicts Republican voting, and 62378 fits that profile on both counts. 62378 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 62378, IL sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 62378 looks the way it does
Homeowners vote more often than renters. About 89% of households in 62378 own their home, about 9 points above the Illinois average of 80%. 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.