62901 leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.
About 54% of adults in 62901 typically vote, below the U.S. average of about 62%. Among adults in 62901, ~38% vote Democratic, ~16% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 62901 compares
Among zip codes within 15 miles, 62901 is the most Democratic-leaning.
62901 runs about 32 points more Democratic than Illinois as a whole.
Politics vary noticeably by block within 62901. The east side is the most Democratic-leaning (D+58) and the northeast side is the least Democratic-leaning (D+4), a spread of about 54 points.
Why 62901 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 62901, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 46% of adults in 62901 hold a bachelor's degree, about 18 points above the U.S. average of 28%. Density combined with diversity predicts Democratic voting, and non-Hispanic white share in 62901 is about 57%, compared to around 84% in nearby zip codes. A high never-married share predicts Democratic voting, and about 61% of adults in 62901 have never been married, above 98% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 62901, IL sits in the top quarter nationally on this measure.
Why turnout in 62901 looks the way it does
Renters vote less often than owners. About 68% of households in 62901 rent, about 43 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 23% of adults in 62901 report food insecurity, above 85% of zip codes. 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.