Somerville leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 68% of adults in Somerville typically vote, above the U.S. average of about 62%. Among adults in Somerville, ~29% vote Democratic, ~39% Republican, and ~32% 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 20 of 50 neighbors.
Somerville runs about 14 points more Democratic than Tennessee as a whole.
Politics vary noticeably by neighborhood within Somerville. The northwest side runs the most Democratic (D+3) and the west side runs the most Republican (R+59), a spread of about 62 points.
Why Somerville leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Somerville. The lean here lands roughly where demographic data alone would predict.
Park access and Republican lean
Places with low park coverage tend to lean Republican; Somerville, TN sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
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
- Warren, TN R+60
- Williston, TN R+39
- Hickory Withe, TN R+46
- Laconia, TN R+43
- Yum Yum, TN R+26
- Oakland, TN R+33
- New Castle, TN R+40
- Macon, TN R+32
- Braden, TN R+41
- Longtown, TN D+33
Cities with Similar Populations
- East Farmingdale, NY Even
- Magnolia, MS D+12
- Calverton, MD D+62
- Tarawa Terrace, NC R+21
- Plainsboro, NJ D+34
- Potomac Mills, VA D+22
- Alvaton, KY R+43
- Davidsonville, MD R+7
- Pinconning, MI R+41
- Woodcliff Lake, NJ D+4
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Tennessee Secretary of State, Division 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.