60155 is a Democratic stronghold. About 86% of voters here vote Democratic and 14% Republican.
About 64% of adults in 60155 typically vote, near the U.S. average of about 62%. Among adults in 60155, ~55% vote Democratic, ~9% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How 60155 compares
Among zip codes within 15 miles, 60155 leans more Democratic than 113 of 133 neighbors.
60155 runs about 61 points more Democratic than Illinois as a whole.
Politics vary noticeably by block within 60155. The northeast side is the most Democratic-leaning (D+82) and the southwest side is the least Democratic-leaning (D+23), a spread of about 59 points.
Why 60155 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 60155, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 60155 live in densely developed areas, about 62 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 41% of adults in 60155 have never been married, above 89% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 60155, IL sits in the top tenth nationally on this measure.
Why turnout in 60155 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 60155 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.