St. Clair is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.
About 59% of adults in St. Clair typically vote, near the U.S. average of about 62%. Among adults in St. Clair, ~8% vote Democratic, ~52% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How St. Clair compares
Among cities within 25 miles, St. Clair leans more Republican than 52 of 75 neighbors.
St. Clair runs about 43 points more Republican than Tennessee as a whole.
Why St. Clair leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for St. Clair, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 97% of residents in St. Clair drive to work alone, about 23 points above the U.S. average of 74%. A high white share with below-average college attainment predicts Republican voting, and St. Clair fits that profile on both counts. A high family-household share predicts Republican voting, and about 81% of households in St. Clair are family households, above 91% of cities.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; St. Clair, TN sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in St. Clair looks the way it does
Areas with limited routine healthcare access turn out at lower rates. St. Clair is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Low high-school completion lines up with lower turnout, and about 85% of adults in St. Clair have completed high school, below 80% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Bulls Gap, TN R+72
- Whitesburg, TN R+72
- Choptack, TN R+74
- Persia, TN R+71
- Mooresburg, TN R+73
- Wyatt Village, TN R+71
- Russellville, TN R+68
- Rogersville, TN R+65
- McCloud, TN R+72
- Silver City, TN R+73
Cities with Similar Populations
- Miracle Valley, AZ R+40
- Polo, SD R+68
- Moccasin, TN R+75
- Orma, WV R+64
- East Winthrop, ME R+8
- Garrison, MO R+66
- Lewisburg, LA R+31
- Willard, NM R+49
- Sonora, MS R+59
- Lafontaine, KS R+70
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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.