Sister or Sisters Island or Islands may refer to several individual islands or island groups:
Antarctic The Sisters (Victoria Land), a pair of Antarctic islands consisting of Gertrude Rock and Rose Rock (Victoria Land)
Australia Sisters Islands (Queensland) Sisters Island (Tasmania), north-west Tasmania Sisters Island Group, Tasmania, Furneaux Group Inner Sister Island Outer Sister Island Shag Reef
Canada Sisters Islands (Nunavut), Canada East Sister Island, Lake Erie, Ontario
Cayman Islands Little Cayman Cayman Brac
India The Sisters (Andaman), two islands in the Duncan Passage, Andaman Islands, India East Sister Island (Andaman) West Sister Island (Andaman)
New Zealand The Sisters/Rangitatahi, Chatham Islands
Singapore Sisters' Islands
United States Sister Islands (Wisconsin) The Sisters (California) Middle Sister Island, Lake Erie, Ohio West Sister Island, Lake Erie, Ohio Sisters Island, Michigan, in Monroe County Sister Islands, in Lake Bonaparte (New York) A small group of islands just northwest of Grand Isle in Lake Champlain, Vermont
See also Three Sisters Islands (disambiguation)