62356 is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 85% of adults in 62356 typically vote, above the U.S. average of about 62%. Among adults in 62356, ~14% vote Democratic, ~71% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How 62356 compares
Among zip codes within 15 miles, 62356 leans more Republican than 9 of 11 neighbors.
62356 runs about 79 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62356 is one of the few Republican-leaning pockets.
Why 62356 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 62356, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 62356, about 98% of residents are non-Hispanic white, about 26 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 13 points below the Illinois average of 27%. Rural areas vote Republican, and 62356 sits in the bottom quarter on density (about 4%, below 86% of zip codes). 62356 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 62356, IL sits in the bottom 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 62356 looks the way it does
High high-school completion lines up with higher turnout, and about 96% of adults in 62356 have completed high school, above 81% 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.