Oak Orchard Creek (sometimes called Oak Orchard River) is a tributary of Lake Ontario in Orleans County, New York in the United States.
The creek flows through Oak Orchard Creek Marsh, 2.4 km2of which were declared a National Natural Landmark in May 1973. The marshlands through which Oak Orchard Creek flows are a major stopover points for migratory birds, and are protected by state- and federally-designated conservation areas.
The state fish hatcheries release brown trout, salmon and steelhead each year into the river. Fishing may be done from boats in the lower part, by wading in the upper parts, and from the shore along its length.
