South Sumter, SC Political Map | Democrat & Republican Areas in South Sumter

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

South Sumter is a Democratic stronghold. About 87% of voters here vote Democratic and 13% Republican.

 

About 71% of adults in South Sumter typically vote, above the U.S. average of about 62%. Among adults in South Sumter, ~62% vote Democratic, ~9% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.

How South Sumter compares

Among cities within 25 miles, South Sumter is the most Democratic-leaning.

South Sumter runs about 92 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while South Sumter is one of the few Democratic-leaning pockets.

Politics vary noticeably by neighborhood within South Sumter. The north side is the most Democratic-leaning (D+85) and the south side is the least Democratic-leaning (D+53), a spread of about 32 points.

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

Density combined with diversity predicts Democratic voting. Non-Hispanic white share in South Sumter is about 8%, about 64 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 43% of adults in South Sumter have never been married, above 96% of cities. South Sumter runs against the grain of South Carolina, a Democratic-leaning pocket in a Republican-leaning state.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; South Sumter, SC 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 South Sumter looks the way it does

Areas with limited routine healthcare access turn out at lower rates. South Sumter is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 46%, about 12 points below the South Carolina average of 58%. 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 South Carolina State Election Commission, 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.