Mount Carbon leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 73% of adults in Mount Carbon typically vote, above the U.S. average of about 62%. Among adults in Mount Carbon, ~27% vote Democratic, ~46% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Mount Carbon compares
Among cities within 25 miles, Mount Carbon leans more Republican than 7 of 87 neighbors.
Mount Carbon runs about 36 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Mount Carbon is one of the few Republican-leaning pockets.
Why Mount Carbon 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 Mount Carbon, not a ranked or complete list of what matters most.
Mount Carbon votes against the grain of Illinois. Illinois leans Democratic overall, while Mount Carbon runs about 36 points more Republican.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Mount Carbon, IL sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Mount Carbon looks the way it does
Turnout in Mount Carbon 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
- Murphysboro, IL R+12
- Harrison, IL R+44
- Oraville, IL R+34
- Carbondale, IL D+36
- Sand Ridge, IL R+54
- DeSoto, IL R+40
- Pomona, IL R+45
- Gorham, IL R+50
- Reeds Station, IL R+13
- Makanda, IL D+6
Cities with Similar Populations
- Shepherd, MS R+16
- Wallingford, IA R+49
- Silver City, NC D+7
- Preston, WA D+28
- Gladstone, ND R+73
- Gnaw Bone, IN R+41
- Palmer, IL R+59
- Callaway, MN R+48
- Blandburg, PA R+60
- Poynor, TX R+44
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.