61833 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 71% of adults in 61833 typically vote, above the U.S. average of about 62%. Among adults in 61833, ~21% vote Democratic, ~49% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 61833 compares
Among zip codes within 15 miles, 61833 leans more Republican than 2 of 19 neighbors.
61833 runs about 51 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 61833 is one of the few Republican-leaning pockets.
Why 61833 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 61833, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 8% of adults in 61833 hold a bachelor's degree, about 19 points below the Illinois average of 27%. Car-dependent areas vote Republican, and about 85% of residents in 61833 drive to work alone, above 87% of zip codes. 61833 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 61833, IL sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 61833 looks the way it does
Turnout in 61833 sits close to the national pattern. 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.