Johnstown
- Country: United States
- State: Pennsylvania
- Population: 19,712 (2016)
- Latitude: 40° 19.6' N (40.32674°)
- Longitude: 78° 55.3' W (-78.92197°)
- Elevation: 356 m/1,168 ft. above sea level
- Time zone: America/New_York (UTC -05:00); DST observed (UTC -04:00)
- Alternate names: Conemaugh, Conemaugh Town