Somerville is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 76% of adults in Somerville typically vote, above the U.S. average of about 62%. Among adults in Somerville, ~14% vote Democratic, ~62% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How Somerville compares
Among cities within 25 miles, Somerville leans more Republican than 79 of 99 neighbors.
Somerville runs about 52 points more Republican than Ohio as a whole.
Why Somerville 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 Somerville, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 78% of households in Somerville are family households, about 12 points above the U.S. average of 67%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Somerville, OH sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Somerville looks the way it does
Turnout in Somerville 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
- West Elkton, OH R+66
- Camden, OH R+64
- Seven Mile, OH R+62
- Gratis, OH R+64
- Morning Sun, OH R+52
- Overpeck, OH R+61
- Trenton, OH R+52
- Enterprise, OH R+67
- Oxford, OH D+16
- New Miami, OH R+46
Cities with Similar Populations
- Pisgah, AL R+78
- Cottondale, FL R+48
- Louisiana, MO R+40
- Bradford, OH R+64
- Lowell, NC R+20
- Oakridge, OR R+8
- Benton Heights, MI D+55
- Casey, IL R+56
- Sparta, MO R+64
- Ely, IA R+17
All Local Stats
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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.