History Jefferson County was organized on July 29, 1797, by proclamation of Governor Arthur St. Clair, six years before Ohio was granted statehood. Its boundaries were originally quite large, including all of northeastern Ohio east of the Cuyahoga River, but it was divided and redrawn several times before assuming its present-day boundaries in 1833, after the formation of neighboring Carroll County.
history jefferson county was organized on july 29 1797 by proclamation of governor arthur st clair six years before ohio was granted statehood its boundaries were originally quite large including all of northeastern ohio east of the cuyahoga river but it was divided and redrawn several times before assuming its present-day boundaries in 1833 after the formation of neighboring carroll county