62205 is a Democratic stronghold. About 93% of voters here vote Democratic and 7% Republican.
About 63% of adults in 62205 typically vote, near the U.S. average of about 62%. Among adults in 62205, ~58% vote Democratic, ~4% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How 62205 compares
Among zip codes within 15 miles, 62205 leans more Democratic than 63 of 66 neighbors.
62205 runs about 75 points more Democratic than Illinois as a whole.
Why 62205 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 62205, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 89% of residents in 62205 live in densely developed areas, about 52 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 54% of adults in 62205 have never been married, above 97% of zip codes.
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; 62205, IL sits in the top quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 62205 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 62205 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 44%, about 18 points below the Illinois average of 63%. 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.