Whitsunday Island is the largest island in the Whitsunday group of islands located off the coast of Central Queensland, Australia.

The Whitsunday Islands are 74 continental islands of various sizes off the central coast of Queensland, Australia, 900 kilometres north of Brisbane. The northernmost of the islands are off the coast by the town of Bowen, while the southernmost islands are off the coast by Proserpine. The island group is centred on Whitsunday Island, while the commercial centre is Hamilton Island. The traditional owners of the area are the Ngaro people and the Gia people, whose Juru people has the only legally recognised native title in the Whitsunday Region.