High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Union Township is one of the twenty-two townships of Tuscarawas County, Ohio, United States. The 2000 census found 1,599 people in the township, 1,277 of whom lived in the unincorporated portions of the township. Two incorporated villages are located in Union Township: part of Dennison in the southwest, and part of Roswell in the northwest. It is one of twenty-seven Union Townships statewide.