29921 leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 46% of adults in 29921 typically vote, below the U.S. average of about 62%. Among adults in 29921, ~30% vote Democratic, ~16% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 29921 compares
Among zip codes within 15 miles, 29921 leans more Democratic than 9 of 11 neighbors.
29921 runs about 48 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while 29921 is one of the few Democratic-leaning pockets.
Why 29921 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 29921, not a ranked or complete list of what matters most.
29921 votes against the grain of South Carolina. South Carolina leans Republican overall, while 29921 runs about 48 points more Democratic. A high never-married share predicts Democratic voting, and about 36% of adults in 29921 have never been married, above 82% of zip codes.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 29921, SC sits in the bottom tenth 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 29921 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 29921 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%. High food insecurity lines up with lower turnout, and about 30% of adults in 29921 report food insecurity, above 94% of zip codes. Low high-school completion lines up with lower turnout, and about 73% of adults in 29921 have completed high school, below 97% 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.