Castalia leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 85% of adults in Castalia typically vote, above the U.S. average of about 62%. Among adults in Castalia, ~25% vote Democratic, ~60% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Castalia compares
Among cities within 25 miles, Castalia leans more Republican than 28 of 72 neighbors.
Castalia runs about 29 points more Republican than Ohio as a whole.
Why Castalia 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 Castalia, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 87% of residents in Castalia drive to work alone, about 13 points above the U.S. average of 74%.
Never-married share and voter turnout
Places with a low never-married share tend to turn out at a higher rate; Castalia, OH sits in the bottom quarter nationally on this measure.
Why turnout in Castalia looks the way it does
Turnout in Castalia 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
- Venice, OH R+39
- Springbrook, OH R+51
- Parkertown, OH R+45
- Bloomingville, OH R+40
- Bay View, OH R+28
- Vickery, OH R+48
- Sandusky, OH Even
- North Monroeville, OH R+53
- Bellevue, OH R+41
- Bogart, OH R+19
Cities with Similar Populations
- Providence, KY R+50
- Drumright, OK R+62
- Homer, GA R+80
- Newbury, OH R+35
- Colliers, WV R+48
- Kingsville, MO R+58
- Niagara, WI R+45
- West Blocton, AL R+72
- Byfield, MA D+16
- Kamiah, ID R+58
Sources and methodology
Precinct-level voting records used to fit the model come from Ohio Secretary of State, 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.