High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Roundhead Township is one of the fifteen townships of Hardin County, Ohio, United States. The 2000 census found 752 people in the township. No municipalities are located in Roundhead Township, although the unincorporated community of Roundhead lies in the township's southeast. It is the only Roundhead Township statewide and is named for a Wyandot chief who inhabited the area in the early 19th century.