37407 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 34% of adults in 37407 typically vote, below the U.S. average of about 62%. Among adults in 37407, ~22% vote Democratic, ~12% Republican, and ~66% don't vote. The map below shows estimated turnout by block group.
How 37407 compares
Among zip codes within 15 miles, 37407 leans more Democratic than 26 of 32 neighbors.
37407 runs about 63 points more Democratic than Tennessee as a whole. Tennessee leans Republican overall, while 37407 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 37407. The northeast side is the most Democratic-leaning (D+57) and the southeast side is the least Democratic-leaning (D+13), a spread of about 43 points.
Why 37407 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 37407, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in 37407 live in densely developed areas, about 60 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in 37407 have never been married, above 90% of zip codes. 37407 runs against the grain of Tennessee, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 37407, TN sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 37407 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 37407 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 39%, about 17 points below the Tennessee average of 56%. Renters vote less often than owners, and about 57% of households in 37407 rent, about 32 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 62% of adults in 37407 have completed high school, in the bottom fraction 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.