Norristown Farm Park is a 690acre Pennsylvania state park in East Norriton and West Norriton Townships and the Borough of Norristown, Montgomery County, Pennsylvania, in the United States. It is operated in partnership with the Montgomery County Department of Parks. The park is a working farm on the site of Norristown State Hospital. Many colonial era farm buildings and homes are on the grounds. Hiking, bicycling, ball fields, fishing, picnicking, and cross-country skiing are available in the park. The park hosts musical concerts in the summer. Stony Creek flows through the park. Norristown Farm Park is just off Interstate 276 on West Germantown Pike.Norristown Farm Park was originally part of a 7000acre tract of land called "Williamstadt," which originally belonged to William Penn. The property was then transferred to Isaac Norris, the namesake of Norristown, by way of Penn's son, William Penn, Jr. Norris' heirs sold pieces of Williamstadt to the Commonwealth of Pennsylvania and Norristown State Hospital was opened in the 1870s as a mental hospital. The park is on state-owned land that surrounds the hospital.
