62312 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 76% of adults in 62312 typically vote, above the U.S. average of about 62%. Among adults in 62312, ~16% vote Democratic, ~60% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 62312 compares
Among zip codes within 15 miles, 62312 leans more Republican than 1 of 12 neighbors.
62312 runs about 68 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62312 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 62312. The northeast side is the most Republican-leaning (R+66) and the east side is the least Republican-leaning (R+47), a spread of about 19 points.
Why 62312 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 62312, not a ranked or complete list of what matters most.
62312 votes against the grain of Illinois. Illinois leans Democratic overall, while 62312 runs about 68 points more Republican. A high white share with below-average college attainment predicts Republican voting, and 62312 fits that profile on both counts.
Housing overcrowding and voter turnout
Places with low overcrowding tend to turn out at a higher rate; 62312, IL sits in the bottom quarter nationally on this measure.
Why turnout in 62312 looks the way it does
Turnout in 62312 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.