61428 leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 81% of adults in 61428 typically vote, above the U.S. average of about 62%. Among adults in 61428, ~26% vote Democratic, ~55% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How 61428 compares
Among zip codes within 15 miles, 61428 leans more Republican than 4 of 14 neighbors.
61428 runs about 46 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61428 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 61428. The southeast side is the most Republican-leaning (R+43) and the north side is the least Republican-leaning (R+33), a spread of about 10 points.
Why 61428 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 61428, not a ranked or complete list of what matters most.
61428 votes against the grain of Illinois. Illinois leans Democratic overall, while 61428 runs about 46 points more Republican. Car-dependent areas vote Republican, and about 83% of residents in 61428 drive to work alone, above 81% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 61428, IL sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 61428 looks the way it does
Homeowners vote more often than renters. About 95% of households in 61428 own their home, about 16 points above the Illinois average of 80%. 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.