Hamilton County, TN Political Map | Democrat & Republican Areas in Hamilton County

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

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

 

About 69% of adults in Hamilton County typically vote, above the U.S. average of about 62%. Among adults in Hamilton County, ~31% vote Democratic, ~38% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.

How Hamilton County compares

Among counties within 50 miles, Hamilton County is the least Republican-leaning.

Hamilton County runs about 20 points more Democratic than Tennessee as a whole.

Politics vary noticeably by city within Hamilton County. The southwest side runs the most Democratic (D+25) and the northeast side runs the most Republican (R+46), a spread of about 70 points.

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

Hamilton County votes Republican even though it is densely developed (about 69%, far above the Tennessee average of 21%). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Hamilton County, TN sits in the top quarter 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 Hamilton County looks the way it does

Turnout in Hamilton County 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.

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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.