Chestnut Ridge Park is a 1,213-acre (4.91 km2) park in Orchard Park, New York, originally named for the chestnut trees on its hills. It is currently the largest park operated by the Erie County Department of Parks, Recreation and Forestry, and is open year-round. The Chestnut Ridge Park property was acquired by Erie County in 1926, and it was one of the first parks established by the county. The park's facilities and landscapes were improved substantially by the Works Progress Administration throughout the 1930s.