Berwick is a borough in Pennsylvania located in the southeastern corner of the state. It is the county seat of Columbia County and is located along the Susquehanna River. The town was founded in 1786 and is the oldest incorporated town in Pennsylvania. Berwick is known for its historic architecture, including the Berwick Armory, the Berwick Historic District, and the Berwick Opera House. The town is also home to the Berwick Academy of Arts and Sciences, a private school. The town is home to a variety of businesses, including manufacturing, retail, and healthcare. The town is also home to a number of parks and recreational areas, including the Berwick Riverfront Park and the Berwick Recreation Center.