Chapin
- County:
- Lexington County
- County Seat:
- No
- Area (mi²):
- 2.233
- State:
- South Carolina
Chapin is a town located in Lexington County, South Carolina. Chapin has a 2026 population of 1,934. Chapin is currently growing at a rate of 1.42% annually and its population has increased by 6.5% since the most recent census, which recorded a population of 1,816 in 2020.