61802 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 62% of adults in 61802 typically vote, near the U.S. average of about 62%. Among adults in 61802, ~42% vote Democratic, ~20% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How 61802 compares
Among zip codes within 15 miles, 61802 leans more Democratic than 17 of 20 neighbors.
61802 runs about 22 points more Democratic than Illinois as a whole.
Politics vary noticeably by block within 61802. The south side runs the most Democratic (D+49) and the northeast side runs the most Republican (R+27), a spread of about 76 points.
Why 61802 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 61802, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 40% of adults in 61802 hold a bachelor's degree, about 12 points above the U.S. average of 28%. Density combined with diversity predicts Democratic voting, and non-Hispanic white share in 61802 is about 56%, compared to around 75% in nearby zip codes. A high never-married share predicts Democratic voting, and about 40% of adults in 61802 have never been married, above 87% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 61802, IL sits in the top quarter 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 61802 looks the way it does
Renters vote less often than owners. About 38% of households in 61802 rent, about 13 points above the U.S. average of 25%. 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.