37311 leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 49% of adults in 37311 typically vote, below the U.S. average of about 62%. Among adults in 37311, ~17% vote Democratic, ~32% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How 37311 compares
Among zip codes within 15 miles, 37311 leans more Republican than 1 of 15 neighbors.
Politically, 37311 sits close to the rest of Tennessee.
Politics vary noticeably by block within 37311. The southwest side is the most Republican-leaning (R+57) and the northeast side is the least Republican-leaning (R+16), a spread of about 41 points.
Why 37311 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 37311, not a ranked or complete list of what matters most.
37311 votes Republican even though it is densely developed (about 75%, far above the Tennessee average of 21%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
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 37311, TN does.
Why turnout in 37311 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 37311 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 37311 rent, compared to around 20% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 85% of adults in 37311 have completed high school, below 81% 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.