Duck Island can refer to any of a number of places, including:
Duck island (garden feature)
Australia Duck Island (Victoria) in Australia Wild Duck Island, in Australia's Northumberland Islands chain
Canada Duck Island (Newfoundland), one of the Wadham Islands Duck Island (Lake Huron), Ontario False Duck Island, in Lake Ontario Main Duck Island, in Lake Ontario
United Kingdom Duck Island (Barnet) in the River Brent, Arkley, England Duck Island, a small island in St. James's Park lake, London Duck Island Cottage, the headquarters of the London Gardens Trust Duck Island, County Antrim, a townland in County Antrim, Northern Ireland
United States Duck Island (Milford, Connecticut), an island in Milford, Connecticut Duck Island, an island in Westbrook, Connecticut Duck Key, Florida Great Duck Island, Maine (sometimes simply called Duck Island) Duck Island (Isles of Shoals), Maine; see Isles of Shoals Duck Island, Maryland, an island in Washington County, Maryland Duck Island (Richland County, Montana), an island in the Yellowstone River in Montana Duck Island (Valley County, Montana), an island in the Missouri River Duck Island, in Squam Lake, New Hampshire Duck Island, a district in the Tremont neighborhood of Cleveland, Ohio Duck Island (New Jersey), a peninsula (formerly an island) at the confluence of the Delaware River and Crosswicks Creek Duck Island, New Jersey, an unincorporated community on the northwest edge of the above peninsula Duck Island (New York), an island in New York Duck Island, in Green Lake (Seattle), Washington Duck Island (Vilas County, Wisconsin) (near the border with Michigan)
Other places Ap Chau, near Hong Kong Patos Island (Venezuela), in Gulf of Paria