Johnstown
- County:
- Fulton County
- County Seat:
- No
- Area (mi²):
- 4.82
- State:
- New York
Johnstown is a city located in Fulton County, New York. Johnstown has a 2026 population of 8,027. Johnstown is currently declining at a rate of -0.9% annually and its population has decreased by -1.82% since the most recent census, which recorded a population of 8,176 in 2020.