Thomaston
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 0.404
- State:
- New York
Thomaston is a village located in Nassau County, New York. Thomaston has a 2026 population of 2,732. Thomaston is currently growing at a rate of 0.26% annually but its population has decreased by -0.8% since the most recent census, which recorded a population of 2,754 in 2020.