Johnstown, city, Cambria county, southwestern Pennsylvania, U.S. It lies at the confluence of the Conemaugh River and Stony Creek, 76 miles (122 km) east of Pittsburgh. Johnstown is the centre of a metropolitan area comprising more than 60 townships and boroughs.
The area was the site of a Shawnee and Delaware Indian village before Joseph Johns, a Swiss Mennonite, founded the town in 1800.