Castleton is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 74% of adults in Castleton typically vote, above the U.S. average of about 62%. Among adults in Castleton, ~16% vote Democratic, ~58% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Castleton compares
Among cities within 25 miles, Castleton is the most Republican-leaning.
Castleton runs about 66 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while Castleton is one of the few Republican-leaning pockets.
Why Castleton 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 Castleton, not a ranked or complete list of what matters most.
Castleton votes against the grain of Illinois. Illinois leans Democratic overall, while Castleton runs about 66 points more Republican.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as Castleton, IL does.
Why turnout in Castleton looks the way it does
Homeowners vote more often than renters. About 91% of households in Castleton own their home, about 11 points above the Illinois average of 80%. High high-school completion lines up with higher turnout, and about 97% of adults in Castleton have completed high school, above 90% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Wyoming, IL R+46
- Broadmoor, IL R+49
- Bradford, IL R+49
- Camp Grove, IL R+49
- Stark, IL R+55
- Toulon, IL R+42
- Lombardville, IL R+49
- Speer, IL R+51
- Milo, IL R+46
- Whitefield, IL R+45
Cities with Similar Populations
- Gilchrist, TN R+73
- Zephyr, NC R+59
- Liberty, LA R+81
- Reagor Springs, TX R+67
- Finland, SC D+13
- Griffith, TN R+70
- Gauley Mills, WV R+67
- Slate Creek, ID R+68
- Joy, KS R+77
- Newburg, ND R+64
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.