62218 is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 71% of adults in 62218 typically vote, above the U.S. average of about 62%. Among adults in 62218, ~14% vote Democratic, ~57% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 62218 compares
Among zip codes within 15 miles, 62218 leans more Republican than 13 of 14 neighbors.
62218 runs about 71 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62218 is one of the few Republican-leaning pockets.
Why 62218 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 62218, not a ranked or complete list of what matters most.
62218 votes against the grain of Illinois. Illinois leans Democratic overall, while 62218 runs about 71 points more Republican. A high family-household share predicts Republican voting, and about 74% of households in 62218 are family households, above 76% of zip codes.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 62218, IL sits in the top tenth nationally on this measure.
Why turnout in 62218 looks the way it does
Homeowners vote more often than renters. About 92% of households in 62218 own their home, about 13 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 96% of adults in 62218 have completed high school, above 83% 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.