Genoa Township is one of the eighteen townships of Delaware County, Ohio, United States. The 2020 census found 24,806 people in the township. A variety of indigenous peoples inhabited Ohio for centuries, among them the Adena and Hopewell cultures. After their decline, others moved in. The French colonials found in central Ohio a variety of natiā¦Genoa Township is one of the eighteen townships of Delaware County, Ohio, United States. The 2020 census found 24,806 people in the township. A variety of indigenous peoples inhabited Ohio for centuries, among them the Adena and Hopewell cultures. After their decline, others moved in. The French colonials found in central Ohio a variety of nations, including Delaware, Miami, Mingo, Ottawa, Shawnee, and Wyandot. The latter were among the last to remain until forced out in 1843.