Washington Park The park's main entrance, 2006 Nearest city Portland, Oregon, United States Coordinates 45°30′57″N 122°42′27″W﻿ / ﻿45.51583°N 122.70750°W﻿ / 45.51583; -122.70750Coordinates: 45°30′57″N 122°42′27″W﻿ / ﻿45.51583°N 122.70750°W﻿ / 45.51583; -122.70750 Area 458.45 acres (185.53 ha) Created 1909 Operated by Portland Parks & Recreation