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

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

Shelbyville leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.

 

About 57% of adults in Shelbyville typically vote, near the U.S. average of about 62%. Among adults in Shelbyville, ~17% vote Democratic, ~40% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.

How Shelbyville compares

Among cities within 25 miles, Shelbyville is the least Republican-leaning.

Shelbyville runs about 13 points more Republican than Tennessee as a whole.

Politics vary noticeably by neighborhood within Shelbyville. The southwest side is the most Republican-leaning (R+63) and the east side is the least Republican-leaning (R+27), a spread of about 36 points.

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

Shelbyville votes Republican even though it is densely developed (about 41%, well above the Tennessee average of 21%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and Shelbyville sits in the bottom quarter (about 15%, below 76% of cities).

High-school completion, developed land, and voter turnout

Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Shelbyville, TN does.

Why turnout in Shelbyville looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Shelbyville is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 36% of households in Shelbyville rent, compared to around 12% in nearby cities. Low high-school completion lines up with lower turnout, and about 83% of adults in Shelbyville have completed high school, below 86% of cities. 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.