Grand Lake Health System

Located in Auglaize County, Ohio, St. Marys is included in the Wapakoneta, Ohio, Micropolitan Statistical Area. The town has had several names, including Fort Barbee and Girty's Town among others, and has a history going back to the early 1800s. Three properties in St. Marys are listed on the National Register of Historic Places: the former Fountain Hotel, the Dr. Issac Elmer Williams House and Office, and the former Holy Rosary Catholic Church.