29403 is a Democratic stronghold. About 76% of voters here vote Democratic and 24% Republican.
About 52% of adults in 29403 typically vote, below the U.S. average of about 62%. Among adults in 29403, ~40% vote Democratic, ~13% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How 29403 compares
Among zip codes within 15 miles, 29403 leans more Democratic than 19 of 20 neighbors.
29403 runs about 69 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while 29403 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 29403. The southwest side is the most Democratic-leaning (D+64) and the south side is the least Democratic-leaning (D+39), a spread of about 25 points.
Why 29403 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 29403, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 84% of residents in 29403 live in densely developed areas, about 48 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 29403 sits in the top quarter (about 63%, above 95% of zip codes). 29403 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; 29403, SC sits in the top tenth nationally on this measure.
Why turnout in 29403 looks the way it does
Renters vote less often than owners. About 65% of households in 29403 rent, about 40 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 29403 sits in the top 15% on a violent-crime measure. 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.