37408 leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 49% of adults in 37408 typically vote, below the U.S. average of about 62%. Among adults in 37408, ~32% vote Democratic, ~17% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How 37408 compares
Among zip codes within 15 miles, 37408 leans more Democratic than 23 of 30 neighbors.
37408 runs about 60 points more Democratic than Tennessee as a whole. Tennessee leans Republican overall, while 37408 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 37408. The southwest side is the most Democratic-leaning (D+56) and the northwest side is the least Democratic-leaning (D+22), a spread of about 34 points.
Why 37408 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 37408, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 37408 live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 37408 sits in the top quarter (about 50%, above 89% of zip codes). 37408 runs against the grain of Tennessee, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 37408, TN sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 37408 looks the way it does
Renters vote less often than owners. About 73% of households in 37408 rent, about 48 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and 37408 sits in the bottom quarter on routine-care measures. High-crime urban areas turn out at lower rates, and 37408 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.