Center Hill leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 69% of adults in Center Hill typically vote, above the U.S. average of about 62%. Among adults in Center Hill, ~23% vote Democratic, ~46% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Center Hill compares
Among cities within 25 miles, Center Hill leans more Republican than 14 of 56 neighbors.
Center Hill runs about 45 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Center Hill is one of the few Republican-leaning pockets.
Why Center Hill leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Center Hill, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Center Hill, about 96% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 13 points below the Illinois average of 27%. Center Hill 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; Center Hill, IL sits below the national average on this measure.
Why turnout in Center Hill looks the way it does
Turnout in Center Hill 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 Cities
- Wacker, IL R+34
- Mount Carroll, IL R+32
- Savanna, IL R+25
- Daggett, IL R+37
- Palsgrove, IL R+41
- Sabula, IA R+44
- Thomson, IL R+38
- Hauntown, IA R+47
- Chadwick, IL R+42
- Teeds Grove, IA R+47
Cities with Similar Populations
- Zigler, WV R+58
- Century, WV R+64
- Oxbo, WI R+33
- Center Mills, PA R+51
- Cravens, AR R+69
- New Lancaster, KS R+59
- Burnt Prairie, IL R+68
- Valier, PA R+71
- Neath, PA R+59
- Piney Fork, KY R+71
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.