Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Berlin Township is one of the eighteen townships of Delaware County, Ohio, United States. The 2000 census found 3,315 people in the township, 3,313 of whom lived in the unincorporated portions of the township. A small part of the city of Delaware, the county seat of Delaware County, is located in northwestern Berlin Township. Statewide, other Berlin Townships are located in Erie, Holmes, Knox, and Mahoning Counties.