The Ada Pennsylvania Station and Railroad Park is a historic train station in Ada, Ohio, United States. Built in 1887 by the Pennsylvania Railroad, it was listed on the National Register of Historic Places in 1998. It is a wooden building, set on a stone foundation and topped with an asphalt roof. The railroad park includes a Pennsylvania Railroad caboose.Founded as a railway town, Ada grew quickly after the establishment of Ohio Northern University in the city in the 1880s. Consequently, this station was built to accommodate increased passenger traffic; its Stick-Eastlake architecture is unusual for Pennsylvania Railroad depots, and it is larger than most stations built to serve small communities.