Warren, industrial city, seat of Trumbull County, northeastern Ohio, on the Mahoning River, near Youngstown; settled 1799, incorporated as a city 1869. Manufactures include motor vehicles, motor-vehicle parts, and steel products. A junior college and an early dwelling, the John Stark Edwards House (1807, now a museum), are here, and Mosquito Creek State Park is nearby. The community is named for Moses Warren, a surveyor active in the area in the late 1790s. By the mid-19th century Warren was a busy inland port, and in 1870 an iron industry was started here. Population 56,629 (1980); 50,793 (1990); 46,832 (2000).
