Ravenna Township is one of the eighteen civil townships of Portage County, Ohio, United States. The 2000 census found 9,270 people in the township.GeographyLocated in the center of the county, it borders the following townships and city: Shalersville Township - northFreedom Township - northeast cornerCharlestown Township - eastEdinburg Township - southeast cornerRootstown Township - southBrimfield Township - southwest cornerFranklin Township - westStreetsboro - northwest corner The city of Ravenna, the county seat of Portage County, which became independent of the township in 1993, is surrounded by Ravenna Township.Formed from Town 3, Range 8 of the Connecticut Western Reserve, Ravenna Township covers an area of 20sqmi.Name and historyIt is the only Ravenna Township statewide. In the western part of the township along Ohio State Route 59 is the unicorporated town of Black Horse (or Blackhorse), named after the Blackhorse Tavern that was located there in the 19th century.