
Allendale
- County:
- Allendale County
- County Seat:
- No
- Area (mi²):
- 3.31
- State:
- South Carolina
Allendale is a town located in Allendale County, South Carolina. Allendale has a 2025 population of 2,362. Allendale is currently declining at a rate of -2.64% annually and its population has decreased by -11.9% since the most recent census, which recorded a population of 2,681 in 2020.
The average household income in Allendale is $39,803 with a poverty rate of 42.76%. The median age in Allendale is 36.9 years: 32 years for males, and 37.9 years for females.