Sharpshin Island is an island on the Potomac River in Montgomery County, Maryland, near Algonkian Regional Park.[1] It is 5.3acres in area, but is very narrow, measuring only across at its broadest point.[2] Because of its plentiful shoreline, it provides habitat for waterfowl, molluscs, crustaceans, amphibians, and reptiles. A land patent for the island for "Harry D. Johnson et. al" in 1903.[3]