Compton leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 85% of adults in Compton typically vote, above the U.S. average of about 62%. Among adults in Compton, ~26% vote Democratic, ~59% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Compton compares
Among cities within 25 miles, Compton leans more Republican than 41 of 68 neighbors.
Compton runs about 49 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Compton is one of the few Republican-leaning pockets.
Why Compton 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 Compton, not a ranked or complete list of what matters most.
Compton votes against the grain of Illinois. Illinois leans Democratic overall, while Compton runs about 49 points more Republican.
Population density and Republican lean
Places with low population density tend to lean Republican; Compton, IL sits in the bottom quarter nationally on this measure.
Why turnout in Compton looks the way it does
Turnout in Compton 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
- The Burg, IL R+38
- West Brooklyn, IL R+39
- Paw Paw, IL R+35
- Shaws, IL R+40
- Steward, IL R+44
- Lee, IL R+40
- Sublette, IL R+40
- Lee Center, IL R+39
- Meriden, IL R+40
- Rollo, IL R+42
Cities with Similar Populations
- Maples, MO R+73
- Edmond, WV R+61
- Dyess, AR R+71
- Big Rock, VA R+67
- Locust Dale, VA R+33
- Stokes, SC R+35
- Colby, ME R+41
- Spring Glen, WA D+25
- Donovan, IL R+52
- Mount Vernon, WI D+20
All Local Stats
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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.