Gaston
- County:
- Lexington County
- County Seat:
- No
- Area (mi²):
- 5.315
- State:
- South Carolina
Gaston is a town located in Lexington County, South Carolina. Gaston has a 2026 population of 1,641. Gaston is currently growing at a rate of 0.43% annually and its population has increased by 2.18% since the most recent census, which recorded a population of 1,606 in 2020.