Spotswood Borough Home potswood is located in an area where the Matchaponix Creek meets the Manalapan Creek in Middlesex County, New Jersey. It is a small, friendly, suburban community, rich in history and tradition. On the register of historic places is Saint Peter's Episcopal Church (pictured below). Although it was built in 1849, first services date back to 1703. In fact, Spotswood was first ...