
Sumter
- County:
- Sumter County
- County Seat:
- No
- Area (mi²):
- 33.029
- State:
- South Carolina
Sumter is a city located in Sumter County, South Carolina. Sumter has a 2025 population of 42,330. Sumter is currently declining at a rate of -0.51% annually and its population has decreased by -2.51% since the most recent census, which recorded a population of 43,420 in 2020.
The average household income in Sumter is $72,655 with a poverty rate of 15.77%. The median age in Sumter is 33.3 years: 30.1 years for males, and 37.5 years for females.