62615 leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 82% of adults in 62615 typically vote, above the U.S. average of about 62%. Among adults in 62615, ~29% vote Democratic, ~53% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 62615 compares
Among zip codes within 15 miles, 62615 leans more Republican than 5 of 17 neighbors.
62615 runs about 40 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62615 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 62615. The northwest side is the most Republican-leaning (R+41) and the west side is the least Republican-leaning (R+15), a spread of about 26 points.
Why 62615 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 62615, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 87% of residents in 62615 drive to work alone, about 14 points above the U.S. average of 74%. 62615 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 62615, IL sits in the top quarter nationally on this measure.
Why turnout in 62615 looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in 62615 have completed high school, about 6 points above the U.S. average of 90%. 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.