38066 leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 69% of adults in 38066 typically vote, above the U.S. average of about 62%. Among adults in 38066, ~23% vote Democratic, ~46% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 38066 compares
Among zip codes within 15 miles, 38066 leans more Republican than 8 of 10 neighbors.
Politically, 38066 sits close to the rest of Tennessee.
Politics vary noticeably by block within 38066. The north side is the most Republican-leaning (R+43) and the southeast side is the least Republican-leaning (R+24), a spread of about 20 points.
Why 38066 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 38066. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 38066, TN sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 38066 looks the way it does
Turnout in 38066 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.