Blackville
- County:
- Barnwell County
- County Seat:
- No
- Area (mi²):
- 8.932
- State:
- South Carolina
Blackville is a town located in Barnwell County, South Carolina. Blackville has a 2026 population of 1,906. Blackville is currently growing at a rate of 0.05% annually but its population has decreased by -0.99% since the most recent census, which recorded a population of 1,925 in 2020.
The median household income in Blackville is $21,742 with a poverty rate of 32.9%. The median age in Blackville is 44.3 years: 42.5 years for males, and 55.4 years for females. For every 100 females there are 93.7 males.