Ballville Township is one of the twelve townships of Sandusky County, Ohio, United States. As of the 2000 census, 6,395 people lived in the unincorporated portions of the township.GeographyLocated in the southern part of the county, it borders the following townships: Sandusky Township - northRiley Township - northeast cornerGreen Creek Township - eastAdams Township, Seneca County - southeast cornerPleasant Township, Seneca County - southLiberty Township, Seneca County - southwest cornerJackson Township - westWashington Township - northwest corner Part of the city of Fremont, the county seat of Sandusky County, is located in northern Ballville Township, as well as the census-designated place of Ballville.