Johnstown is a 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 had 133,472 residents in 2020. It is also part of the Johnstown–Somerset combined statistical area, which includes both Cambria and Somerset counties. Once a bustling industrial center, like many cities in the Rust Belt, Johnstown was severely affected by the loss of jobs in the steel industry due to globalization and the movement of American manufacturing to overseas markets.