Johnstown is the largest city in Cambria County, Pennsylvania, United States. The population was 18,411 as of the 2020 census. Located 57 miles (92 km) east of Pittsburgh, it is the principal city of the Johnstown metropolitan area, which is located in Cambria County and had 133,472 residents in 2020. It is also part of the Johnstown–Somerset combined statistical area, which includes both Cambria and Somerset Counties.

Cambria County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 133,472. Its county seat is Ebensburg. The county was created on March 26, 1804, from parts of Bedford, Huntingdon, and Somerset counties and later organized in 1807. It was named for the nation of Wales, which in Latin is known as "Cambria". The county is part of the Southwest Pennsylvania region of the state.