High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Washington Township is one of the fourteen townships of Carroll County, Ohio, United States. THe 2000 census found 1,061 people in the township. IT is one of forty-three Washington Townships statewide. ORiginally Township 14 of range 5 of the Old Seven Ranges, and later a part of Columbiana County, the township was admitted whole with the formation of Carroll county. IN March, 1836, the county commissioners took part of Washington township along with a part of Harrison Township to form Centre (later Center) township.