Warren is a city located in Trumbull County, Ohio, within the United States. Serving as the county seat, it is situated along the Mahoning River in the northeastern region of the state. The city's population was recorded at 39,201 during the 2020 census.
Geographically, Warren is positioned approximately 14 miles northwest of Youngstown and 56 miles southeast of Cleveland. It functions as a principal city within the Mahoning Valley metropolitan area. Historically, the city served as the county seat of the Connecticut Western Reserve.