37915 is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.
About 39% of adults in 37915 typically vote, below the U.S. average of about 62%. Among adults in 37915, ~31% vote Democratic, ~8% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 37915 compares
Among zip codes within 15 miles, 37915 is the most Democratic-leaning.
37915 runs about 87 points more Democratic than Tennessee as a whole. Tennessee leans Republican overall, while 37915 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 37915. The north side is the most Democratic-leaning (D+75) and the northwest side is the least Democratic-leaning (D+26), a spread of about 48 points.
Why 37915 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 37915, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 91% of residents in 37915 live in densely developed areas, about 55 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 55% of adults in 37915 have never been married, above 97% of zip codes. 37915 runs against the grain of Tennessee, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 37915, TN sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 37915 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 37915 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 38%, about 18 points below the Tennessee average of 56%. Renters vote less often than owners, and about 73% of households in 37915 rent, compared to around 52% in nearby zip codes. High-crime urban areas turn out at lower rates, and 37915 sits in the top 15% on a violent-crime measure. 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.