37902 leans heavily Democratic by roughly 42 points: about 71% of voters vote Democratic and 29% Republican.
About 48% of adults in 37902 typically vote, below the U.S. average of about 62%. Among adults in 37902, ~34% vote Democratic, ~14% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 37902 compares
Among zip codes within 15 miles, 37902 leans more Democratic than 26 of 27 neighbors.
37902 runs about 71 points more Democratic than Tennessee as a whole. Tennessee leans Republican overall, while 37902 is one of the few Democratic-leaning pockets.
Why 37902 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 37902, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in 37902 live in densely developed areas, about 61 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 37902 sits in the top quarter (about 61%, above 94% of zip codes). 37902 runs against the grain of Tennessee, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 37902, TN sits in the top quarter nationally on this measure.
Why turnout in 37902 looks the way it does
Renters vote less often than owners. About 81% of households in 37902 rent, about 56 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 37902 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.