Johnstown is a city in and the county seat of Fulton County in the U.S. state of New York. The city was named after its founder, Sir William Johnson, Superintendent of Indian Affairs in the Province of New York and a major general during the Seven Years' War in North America. It is located approximately 45 miles northwest of Albany, about one-third of the way between Albany and the Finger Lakes region to the west, in the Mohawk Valley region, within the foothills of the Adirondack Mountains.