62630 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 78% of adults in 62630 typically vote, above the U.S. average of about 62%. Among adults in 62630, ~17% vote Democratic, ~61% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 62630 compares
Among zip codes within 15 miles, 62630 leans more Republican than 3 of 10 neighbors.
62630 runs about 66 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62630 is one of the few Republican-leaning pockets.
Why 62630 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 62630, not a ranked or complete list of what matters most.
62630 votes against the grain of Illinois. Illinois leans Democratic overall, while 62630 runs about 66 points more Republican. Rural areas with a high white share vote Republican. Non-Hispanic white share in 62630 is about 95%, well above similar-sized zip codes (around 79%). A high family-household share predicts Republican voting, and about 74% of households in 62630 are family households, above 78% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 62630, IL sits in the bottom tenth 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 62630 looks the way it does
Homeowners vote more often than renters. About 97% of households in 62630 own their home, about 18 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.