62423 is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 84% of adults in 62423 typically vote, above the U.S. average of about 62%. Among adults in 62423, ~19% vote Democratic, ~65% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How 62423 compares
Among zip codes within 15 miles, 62423 leans more Republican than 15 of 17 neighbors.
62423 runs about 65 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62423 is one of the few Republican-leaning pockets.
Why 62423 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 62423, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. More than 99% of residents in 62423 drive to work alone, about 26 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 82% of households in 62423 are family households, above 94% of zip codes. 62423 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 62423, IL sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 62423 looks the way it does
Turnout in 62423 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.