Marion, SC Political Map | Democrat & Republican Areas in Marion

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

Marion leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.

 

About 69% of adults in Marion typically vote, above the U.S. average of about 62%. Among adults in Marion, ~43% vote Democratic, ~26% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.

How Marion compares

Among cities within 25 miles, Marion leans more Democratic than 44 of 46 neighbors.

Marion runs about 43 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while Marion is one of the few Democratic-leaning pockets.

Politics vary noticeably by neighborhood within Marion. The south side runs the most Democratic (D+55) and the northwest side runs the most Republican (R+6), a spread of about 62 points.

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

Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Marion is about 38%, about 34 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 47% of adults in Marion have never been married, above 97% of cities. Marion runs against the grain of South Carolina, a Democratic-leaning pocket in a Republican-leaning state.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Marion, SC sits in the top quarter nationally on this measure.

Why turnout in Marion looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Marion 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 48%, about 11 points below the South Carolina average of 58%. Learn more about the findings and methodology on the political spectrum map.

All Local Stats

Home Services

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.