Erwin
- County:
- Unicoi County
- County Seat:
- Yes
- Area (mi²):
- 4.126
- State:
- Tennessee
Erwin is a town located in Unicoi County, Tennessee. Erwin has a 2026 population of 6,020. It is also the county seat of Unicoi County. Erwin is currently growing at a rate of 0.13% annually but its population has decreased by -0.74% since the most recent census, which recorded a population of 6,065 in 2020.