37863 leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 61% of adults in 37863 typically vote, near the U.S. average of about 62%. Among adults in 37863, ~15% vote Democratic, ~46% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 37863 compares
Among zip codes within 15 miles, 37863 is the least Republican-leaning.
37863 runs about 20 points more Republican than Tennessee as a whole.
Politics vary noticeably by block within 37863. The west side is the most Republican-leaning (R+54) and the north side is the least Republican-leaning (R+34), a spread of about 20 points.
Why 37863 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 37863, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 14% of adults in 37863 hold a bachelor's degree, about 8 points below the Tennessee average of 22%.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 37863, TN does.
Why turnout in 37863 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 37863 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 50% of households in 37863 rent, compared to around 24% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 76% of adults in 37863 have completed high school, below 95% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.