Supiori is an island in Cenderawasih Bay just west of Biak in the Schouten Islands in Papua Province, Indonesia. It has a rugged surface, largely covered in tropical rainforest, with its highest point at 1034 metres. It is about forty kilometres long and 25 kilometres wide, covering a total area of 659 square kilometres. Principal settlements include Korido on the south coast and Yenggarbun on the north coast. South of Supiori lie the small coral islands Aruri (Insumbabi) and Rani. Before 1963, the island formed part of Netherlands New Guinea.