62831 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 76% of adults in 62831 typically vote, above the U.S. average of about 62%. Among adults in 62831, ~16% vote Democratic, ~60% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 62831 compares
Among zip codes within 15 miles, 62831 leans more Republican than 6 of 11 neighbors.
62831 runs about 68 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62831 is one of the few Republican-leaning pockets.
Why 62831 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 62831, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 89% of residents in 62831 drive to work alone, about 16 points above the U.S. average of 74%. A high white share with below-average college attainment predicts Republican voting, and 62831 fits that profile on both counts. 62831 runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 62831, IL does.
Why turnout in 62831 looks the way it does
Homeowners vote more often than renters. About 89% of households in 62831 own their home, about 10 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 96% of adults in 62831 have completed high school, above 80% 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.