
Spartanburg County
- State:
- South Carolina
Spartanburg County's estimated 2025 population is 378,198 with a growth rate of 2.93% in the past year according to the most recent United States census data. Spartanburg County is the 5th largest county in South Carolina. The 2010 population was 284,769 and has seen a growth of 32.81% since that time.