29378 leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 30% of adults in 29378 typically vote, below the U.S. average of about 62%. Among adults in 29378, ~20% vote Democratic, ~10% Republican, and ~70% don't vote. The map below shows estimated turnout by block group.
How 29378 compares
Among zip codes within 15 miles, 29378 leans more Democratic than 28 of 29 neighbors.
29378 runs about 53 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while 29378 is one of the few Democratic-leaning pockets.
Why 29378 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 29378, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 29378 is about 18%, about 54 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 51% of adults in 29378 have never been married, above 96% of zip codes. 29378 runs against the grain of South Carolina, a Democratic-leaning pocket in a Republican-leaning state.
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 29378, SC does.
Why turnout in 29378 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 29378 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 35%, about 23 points below the South Carolina average of 58%. Renters vote less often than owners, and about 66% of households in 29378 rent, compared to around 36% in nearby zip codes. High food insecurity lines up with lower turnout, and about 48% of adults in 29378 report food insecurity, in the top fraction of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.