High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Denmark Township is one of the twenty-seven townships of Ashtabula County, Ohio, United States. The 2000 census found 880 people in the township. It is the only Denmark Township statewide. The area now composing Denmark Township was long inhabited by the Seneca Indian tribe. Peter Knapp, a New Yorker who arrived in 1809, was the first white settler in the area.