62665 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 73% of adults in 62665 typically vote, above the U.S. average of about 62%. Among adults in 62665, ~16% vote Democratic, ~57% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How 62665 compares
Among zip codes within 15 miles, 62665 leans more Republican than 5 of 12 neighbors.
62665 runs about 68 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62665 is one of the few Republican-leaning pockets.
Why 62665 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 62665, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 10% of adults in 62665 hold a bachelor's degree, about 17 points below the Illinois average of 27%. 62665 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Republican lean
Places with low population density tend to lean Republican; 62665, IL sits below the national average on this measure.
Why turnout in 62665 looks the way it does
Turnout in 62665 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.