61015 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 97% of adults in 61015 typically vote, above the U.S. average of about 62%. Among adults in 61015, ~30% vote Democratic, ~67% Republican, and ~3% don't vote. The map below shows estimated turnout by block group.
How 61015 compares
Among zip codes within 15 miles, 61015 leans more Republican than 11 of 16 neighbors.
61015 runs about 50 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61015 is one of the few Republican-leaning pockets.
Why 61015 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 61015, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 61015, about 96% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 17% of adults hold a bachelor's degree, about 10 points below the Illinois average of 27%. 61015 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; 61015, 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 61015 looks the way it does
Homeowners vote more often than renters. About 95% of households in 61015 own their home, about 16 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.