Goose Island is a small (2 ha), rocky island lying about 550 m from the northern end of the much larger Wardang Island, off the west coast of the Yorke Peninsula, in the Spencer Gulf of South Australia. Rising to a height of 26 m, its vegetation is dominated by African boxthorn on clay and calcarenite soils. The waters surrounding the island are protected in the Goose Island Aquatic Reserve.