Barnwell leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 65% of adults in Barnwell typically vote, near the U.S. average of about 62%. Among adults in Barnwell, ~26% vote Democratic, ~39% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Barnwell compares
Among cities within 25 miles, Barnwell leans more Republican than 18 of 36 neighbors.
Politically, Barnwell sits close to the rest of South Carolina.
Politics vary noticeably by neighborhood within Barnwell. The southwest side runs the most Democratic (D+6) and the east side runs the most Republican (R+55), a spread of about 61 points.
Why Barnwell 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 Barnwell, not a ranked or complete list of what matters most.
Barnwell votes Republican even though it is densely developed (about 21%, about 15 points below the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Barnwell, SC sits below the national average 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 Barnwell looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Barnwell 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 Cities
- Hilda, SC R+60
- Yenome, SC R+29
- Snelling, SC R+22
- Kline, SC D+2
- Elko, SC R+35
- Olar, SC R+45
- Blackville, SC D+28
- Martin, SC D+27
- Williston, SC R+16
Cities with Similar Populations
- Bunnell, FL R+38
- Madison, GA R+26
- Belding, MI R+28
- Altoona, WI D+14
- Shiprock, NM D+31
- West Terre Haute, IN R+40
- McCook, NE R+52
- Polson, MT R+20
- Catlettsburg, KY R+53
- Cresskill, NJ Even
All Local Stats
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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.