what county is johnstown new york
For the adjacent town, see Johnstown (town), New York. Johnstown is a city and the county seat of Fulton County in the U.S. state of New York. As of the 2010 Census, the city had population of 8,743. The city was named after its founder, Sir William Johnson. The city of Johnstown is mostly surrounded by the town of Johnstown, of which it was once a part when it was a village.