29405 is a Democratic stronghold. About 78% of voters here vote Democratic and 22% Republican.
About 56% of adults in 29405 typically vote, below the U.S. average of about 62%. Among adults in 29405, ~44% vote Democratic, ~12% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How 29405 compares
Among zip codes within 15 miles, 29405 is the most Democratic-leaning.
29405 runs about 74 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while 29405 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 29405. The east side is the most Democratic-leaning (D+82) and the north side is the least Democratic-leaning (D+36), a spread of about 46 points.
Why 29405 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 29405, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in 29405 live in densely developed areas, about 51 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 44% of adults in 29405 have never been married, above 91% of zip codes. 29405 runs against the grain of South Carolina, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 29405, SC sits in the top 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 29405 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 29405 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 49% of households in 29405 rent, about 24 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 29% of adults in 29405 report food insecurity, above 93% 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.