Deer Island may refer to:
Canada Deer Island, Bonavista Bay, Newfoundland and Labrador Deer Island (New Brunswick) Deer Island (Kivalliq Region), Nunavut Qikiqtaarjuk, formerly Deer Island, Qikiqtaaluk Region, Nunavut
United States Deer Island (Alaska Panhandle), Alaska Deer Island (Aleutian Islands), Alaska Deer Island (Arizona and California) Deer Island (Marin County), California Deer Isle, Maine Deer Island (Massachusetts) Deer Island Prison Deer Island Waste Water Treatment Plant Deer Island (Amesbury, Massachusetts) Deer Island (Mississippi) Deer Island (Thousand Islands), New York Deer Island, Oregon
Other places Deer Island (Ireland) Eilean an Fheidh ('Deer Island'), Scotland
See also Deer Island Lake, Michigan, United States Île aux Cerfs ('Deer Isle'), Mauritius Cerf Island, Seychelles Jura, Scotland North Deer Island (Texas)