Bennettsville
- County:
- Marlboro County
- County Seat:
- No
- Area (mi²):
- 6.177
- State:
- South Carolina
Bennettsville is a city located in Marlboro County, South Carolina. Bennettsville has a 2026 population of 7,595. Bennettsville is currently declining at a rate of -1.36% annually and its population has decreased by -4.93% since the most recent census, which recorded a population of 7,989 in 2020.