McNairy County is a Republican stronghold. About 15% of voters here vote Democratic and 85% Republican.
About 64% of adults in McNairy County typically vote, near the U.S. average of about 62%. Among adults in McNairy County, ~10% vote Democratic, ~55% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How McNairy County compares
Among counties within 50 miles, McNairy County leans more Republican than 11 of 13 neighbors.
McNairy County runs about 41 points more Republican than Tennessee as a whole.
Politics vary noticeably by city within McNairy County. The east side is the most Republican-leaning (R+77) and the west side is the least Republican-leaning (R+65), a spread of about 12 points.
Why McNairy County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for McNairy County, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 13% of adults in McNairy County hold a bachelor's degree, about 9 points below the Tennessee average of 22%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; McNairy County, TN sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in McNairy County looks the way it does
Turnout in McNairy County sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Hardin County, TN R+69
- Alcorn County, MS R+59
- Chester County, TN R+61
- Hardeman County, TN R+14
- Henderson County, TN R+65
- Tishomingo County, MS R+76
- Tippah County, MS R+61
- Madison County, TN R+2
- Prentiss County, MS R+58
- Decatur County, TN R+69
Counties with Similar Populations
- Montezuma County, CO R+24
- Hart County, GA R+47
- Brown County, MN R+37
- Lamoille County, VT D+7
- Dickinson County, MI R+25
- Simpson County, MS R+29
- Russell County, VA R+68
- Lawrence County, SD R+37
- Sunflower County, MS D+35
- Montgomery County, NC R+34
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.