The Youngstown–Warren, OH Metropolitan Statistical Area, typically known as the Mahoning Valley, is a metropolitan area in Northeast Ohio with Youngstown, Ohio, at its center. According to the U.S. Census Bureau, the metropolitan statistical area (MSA) includes Mahoning and Trumbull counties. As of the 2020 census, the region had a population of 430,591, making it the 125th-largest metro area in the country.

The region Northeast Ohio, in the US state of Ohio, in its most expansive usage contains six metropolitan statistical areas: Cleveland–Elyria, Akron, Canton–Massillon, Youngstown–Warren, Mansfield, and Weirton–Steubenville along with eight micropolitan statistical areas. Most of the region is considered either part of the Cleveland–Akron–Canton, OH Combined Statistical Area and media market or the Youngstown–Warren, OH–PA Combined Statistical Area and media market. In all, the region is home to: 4,502,460 residents. It is also a part of the Great Lakes megalopolis, containing over 54 million people. Northeast Ohio also includes most of the area known historically as the Connecticut Western Reserve.