Neptune is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 64% of adults in Neptune typically vote, near the U.S. average of about 62%. Among adults in Neptune, ~13% vote Democratic, ~51% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How Neptune compares
Among cities within 25 miles, Neptune leans more Republican than 28 of 65 neighbors.
Neptune runs about 28 points more Republican than Tennessee as a whole.
Why Neptune 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 Neptune, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 86% of residents in Neptune drive to work alone, about 13 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 79% of households in Neptune are family households, above 86% of cities.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Neptune, TN sits in the top quarter nationally on this measure.
Why turnout in Neptune looks the way it does
Homeowners vote more often than renters. About 90% of households in Neptune own their home, about 13 points above the Tennessee average of 77%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fox Bluff, TN R+65
- Cheap Hill, TN R+64
- Henrietta, TN R+60
- Chapmansboro, TN R+63
- Southside, TN R+65
- Lockertsville, TN R+61
- Stayton, TN R+69
- Petway, TN R+63
- Ashland City, TN R+55
- Liverwort, TN R+66
Cities with Similar Populations
- Romancoke on the Bay, MD R+28
- Casa Blanco, FL R+27
- Rondo, MO R+69
- Keyes, OK R+86
- Kenoza Lake, NY R+11
- Penfield, IL R+50
- Richmond, MS R+67
- Palmer, IA R+57
- Unionville, PA R+57
- Leesville, OH R+57
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.