61528 leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 82% of adults in 61528 typically vote, above the U.S. average of about 62%. Among adults in 61528, ~35% vote Democratic, ~47% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 61528 compares
Among zip codes within 15 miles, 61528 leans more Republican than 11 of 26 neighbors.
61528 runs about 24 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61528 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 61528. The northwest side is the most Republican-leaning (R+34) and the east side is the least Republican-leaning (R+4), a spread of about 29 points.
Why 61528 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 61528, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 81% of households in 61528 are family households, about 14 points above the U.S. average of 67%. 61528 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; 61528, IL sits in the bottom quarter nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in 61528 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 61528 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 61528 have completed high school, above 89% 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.