37665 is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 59% of adults in 37665 typically vote, near the U.S. average of about 62%. Among adults in 37665, ~15% vote Democratic, ~44% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 37665 compares
Among zip codes within 15 miles, 37665 leans more Republican than 3 of 13 neighbors.
37665 runs about 20 points more Republican than Tennessee as a whole.
Politics vary noticeably by block within 37665. The northwest side is the most Republican-leaning (R+54) and the south side is the least Republican-leaning (R+42), a spread of about 13 points.
Why 37665 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 37665, not a ranked or complete list of what matters most.
37665 votes Republican even though it is densely developed (about 70%, far above the Tennessee average of 21%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and 37665 sits in the bottom quarter (about 16%, below 77% of zip codes).
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 37665, TN sits in the bottom quarter 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 37665 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 37665 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.