Youngstown is a city in Ohio, United States. It is the county seat of Mahoning County. Part of Youngstown is also in Trumbull County. The town is on the Mahoning River. It is about southeast of Cleveland and northwest of Pittsburgh, Pennsylvania. Youngstown has its own metropolitan area; it is often thought of as part of the Pittsburgh Tri-State area and Greater Cleveland. Youngstown is west of the Pennsylvania state line. It is midway between New York City and Chicago via Interstate 80.