Youngstown is a city in and the county seat of Mahoning County, Ohio, United States. At the 2020 census, it had a population of 60,068, making it the 11th-most populous city in Ohio. It is a principal city of the Youngstown–Warren metropolitan area, which had a population of 430,591 in 2020, making it the seventh-largest metro area in Ohio and 125th-largest metro area in the U.S. Youngstown is situated on the Mahoning River in Northeast Ohio, 58 miles (93 km) southeast of Cleveland and 61 miles (100 km) northwest of Pittsburgh.

Youngstown is a midwestern city located at the foothills of the Appalachian Mountains. The city was named for John Young, an early settler from Whitestown, New York, who established the community's first sawmill and gristmill. It was an early industrial city of the late 19th and early 20th centuries and became known as a center of steel production. With the movement of jobs offshore as the steel industry in the United States fell into decline in the 1970s, the city became exemplary of the Rust Belt. Youngstown has seen a decline in population within city limits of nearly 65 percent since 1960.

Downtown Youngstown has seen various revitalization efforts in the 21st century, including the Covelli Centre and Youngstown Foundation Amphitheatre. Other notable institutions in the city include the Butler Institute of American Art, Mill Creek Park, Stambaugh Auditorium, and Youngstown State University. Youngstown's first new downtown hotel since 1974—the DoubleTree by Hilton—opened in 2018 in the historic Stambaugh Building, adapted for this use.