Formed 16 Feb 1846, 415 square miles.
Parent counties: Columbiana and Trumbull
Evolution of county from date of formation until it assumed its final form
1 Mar 1846: Erected and organized
In 1848, the county seat was in Canfield. It was moved to Youngstown in 1879.
Federal Population schedules extant from 1820-1940. (1890 missing)
1820 Manufacturers (part of Columbiana and Trumbull); 1850 Agricultural; 1850 Industry; 1850 Mortality; 1860 Agricultural; 1860 Mortality; 1880 Agricultural; 1880 Defective, Dependent, and Delinquent
Austintown, Beaver, Berlin, Boardman, Canfield, Coitsville, Ellsworth, Goshen, Green, Jackson, Milton, Poland, Smith, and Springfield.
Jana Broglin, CG, OGSF