61801 is a Democratic stronghold. About 81% of voters here vote Democratic and 19% Republican.
About 53% of adults in 61801 typically vote, below the U.S. average of about 62%. Among adults in 61801, ~43% vote Democratic, ~10% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 61801 compares
Among zip codes within 15 miles, 61801 is the most Democratic-leaning.
61801 runs about 51 points more Democratic than Illinois as a whole.
Politics vary noticeably by block within 61801. The northwest side is the most Democratic-leaning (D+68) and the northeast side is the least Democratic-leaning (D+45), a spread of about 23 points.
Why 61801 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 61801, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 57% of adults in 61801 hold a bachelor's degree, about 28 points above the U.S. average of 28%. Dense areas vote Democratic, and 61801 sits in the top fifth on density (about 97%, above 93% of zip codes). A high never-married share predicts Democratic voting, and about 69% of adults in 61801 have never been married, in the top fraction of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 61801, IL sits in the top tenth nationally on this measure.
Why turnout in 61801 looks the way it does
Renters vote less often than owners. About 68% of households in 61801 rent, about 43 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 22% of adults in 61801 report food insecurity, above 84% 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.