
Johnston
- County:
- Edgefield County
- County Seat:
- No
- Area (mi²):
- 2.621
- State:
- South Carolina
Johnston is a town located in Edgefield County, South Carolina. Johnston has a 2025 population of 2,224. Johnston is currently growing at a rate of 2.07% annually and its population has increased by 11.14% since the most recent census, which recorded a population of 2,001 in 2020.
The average household income in Johnston is $48,521 with a poverty rate of 27.12%. The median age in Johnston is 45.7 years: 40.7 years for males, and 47 years for females.