Carbon Hill leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 87% of adults in Carbon Hill typically vote, above the U.S. average of about 62%. Among adults in Carbon Hill, ~29% vote Democratic, ~58% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How Carbon Hill compares
Among cities within 25 miles, Carbon Hill leans more Republican than 27 of 63 neighbors.
Carbon Hill runs about 45 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Carbon Hill is one of the few Republican-leaning pockets.
Why Carbon 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 Carbon Hill, not a ranked or complete list of what matters most.
Carbon Hill votes against the grain of Illinois. Illinois leans Democratic overall, while Carbon Hill runs about 45 points more Republican. Dense places usually vote Democratic, but Carbon Hill runs against that pattern. A high family-household share predicts Republican voting, and about 84% of households in Carbon Hill are family households, above 96% of cities.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Carbon Hill, IL sits in the top tenth nationally on this measure.
Why turnout in Carbon Hill looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Carbon Hill have completed high school, about 5 points above the Illinois average of 92%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Coal City, IL R+30
- Eileen, IL R+25
- Diamond, IL R+33
- Braidwood, IL R+32
- Lorenzo, IL R+38
- Braceville, IL R+31
- Godley, IL R+40
- Lakewood Shores, IL R+47
- Mazon, IL R+42
- Gardner, IL R+32
Cities with Similar Populations
- Zion Station, KY R+64
- Lakeview, PA R+53
- Kralltown, PA R+56
- North Bradford, ME R+37
- Catons Grove, TN R+67
- Highland Spring, KY R+52
- Weissert, NE R+69
- Leisure Knoll, NJ R+13
- Hannover, ND R+67
- Gilford, MI R+52
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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.