Williamsburg County leans Democratic by roughly 26 points: about 63% of voters vote Democratic and 37% Republican.
About 69% of adults in Williamsburg County typically vote, above the U.S. average of about 62%. Among adults in Williamsburg County, ~43% vote Democratic, ~26% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Williamsburg County compares
Among counties within 50 miles, Williamsburg County is the most Democratic-leaning.
Williamsburg County runs about 44 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while Williamsburg County is one of the few Democratic-leaning pockets.
Politics vary noticeably by city within Williamsburg County. The southwest side runs the most Democratic (D+51) and the southeast side runs the most Republican (R+25), a spread of about 76 points.
Why Williamsburg 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 Williamsburg County, not a ranked or complete list of what matters most.
Williamsburg County votes against the grain of South Carolina. South Carolina leans Republican overall, while Williamsburg County runs about 44 points more Democratic. A high never-married share predicts Democratic voting, and about 38% of adults in Williamsburg County have never been married, above 91% of counties.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Williamsburg County, SC sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Williamsburg County looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Williamsburg County is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Clarendon County, SC R+8
- Georgetown County, SC R+17
- Florence County, SC Even
- Marion County, SC D+17
- Sumter County, SC D+9
- Berkeley County, SC R+13
- Horry County, SC R+30
- Lee County, SC D+20
- Darlington County, SC R+8
- Dorchester County, SC R+12
Counties with Similar Populations
- Kleberg County, TX R+6
- Bee County, TX R+22
- Summit County, CO D+23
- Elk County, PA R+42
- Bolivar County, MS D+34
- Stone County, MO R+55
- Wabash County, IN R+48
- Washington County, ME R+24
- Muhlenberg County, KY R+55
- Sheridan County, WY R+47
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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.