High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Charlestown Township is one of the eighteen townships of Portage County, Ohio, United States. The 2000 census found 2,003 people in the township. It is the only Charlestown Township statewide. The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1. Two are elected in the year after the presidential election and one is elected in the year before it.