62220 leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 65% of adults in 62220 typically vote, near the U.S. average of about 62%. Among adults in 62220, ~37% vote Democratic, ~28% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How 62220 compares
Among zip codes within 15 miles, 62220 leans more Democratic than 15 of 30 neighbors.
Politically, 62220 sits close to the rest of Illinois.
Politics vary noticeably by block within 62220. The east side runs the most Democratic (D+28) and the southeast side runs the most Republican (R+9), a spread of about 37 points.
Why 62220 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 62220, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 62220 is about 67%, about 5 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 38% of adults in 62220 have never been married, above 85% of zip codes.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 62220, IL sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 62220 looks the way it does
Turnout in 62220 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.