Mercer, TN Political Map | Democrat & Republican Areas in Mercer

By the BestNeighborhood data science team. Last updated May 2026.

Mercer leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.

 

About 61% of adults in Mercer typically vote, near the U.S. average of about 62%. Among adults in Mercer, ~27% vote Democratic, ~33% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.

How Mercer compares

Among cities within 25 miles, Mercer leans more Republican than 15 of 62 neighbors.

Mercer runs about 19 points more Democratic than Tennessee as a whole.

Politics vary noticeably by neighborhood within Mercer. The northwest side runs the most Democratic (D+25) and the south side runs the most Republican (R+59), a spread of about 85 points.

Why Mercer 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 Mercer, not a ranked or complete list of what matters most.

Areas with many family households vote Republican. About 80% of households in Mercer are family households, about 13 points above the U.S. average of 67%.

Walkability and Republican lean

Places with a low walkability score tend to lean Republican; Mercer, 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 Mercer looks the way it does

Areas with low high-school completion turn out at lower rates. About 81% of adults in Mercer have completed high school, about 9 points below the U.S. average of 90%. Learn more about the findings and methodology on the political spectrum map.

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.