62230 is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 55% of adults in 62230 typically vote, below the U.S. average of about 62%. Among adults in 62230, ~13% vote Democratic, ~42% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How 62230 compares
Among zip codes within 15 miles, 62230 leans more Republican than 9 of 14 neighbors.
62230 runs about 65 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while 62230 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 62230. The northwest side is the most Republican-leaning (R+62) and the east side is the least Republican-leaning (R+52), a spread of about 10 points.
Why 62230 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 62230, not a ranked or complete list of what matters most.
62230 votes against the grain of Illinois. Illinois leans Democratic overall, while 62230 runs about 65 points more Republican.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 62230, 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 62230 looks the way it does
Turnout in 62230 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.