King Island, Kings Island or King's Island may refer to:
Australia King Island (Queensland) King Island, at Wellington Point, Queensland King Island (Tasmania) King Island Council, the local government area that contains the Tasmanian island
Canada King Island (British Columbia) King Island (Nunavut) King Island (Saskatchewan) King Island, Newfoundland and Labrador, a settlement
United States King Island (Alaska) King Island (California) Kings Island (California) King's Island (Connecticut) King's Island (Pennsylvania) Kings Island, amusement park in Mason, Ohio
Elsewhere Kadan Kyun, formerly known as King Island, in Myanmar's Mergui Archipelago King Island (New Zealand), island off the north coast of the North Island King's Island, Limerick, Ireland, an area of Limerick city King Peninsula, Antarctica, originally believed to be an island ("King Island") but later discovered to be a peninsula