The Whitsunday Islands is an informal term used for a group of approximately 74 islands that lie off the central coast of Queensland between the mainland towns of Bowen and Mackay, 900 kilometres north of Brisbane. The Whitsunday Islands are a popular tourist destination for travellers to Queensland and the Great Barrier Reef, attracting 700,000 visitors annually.

The island group is centred on Whitsunday Island, while the group's commercial centre is Hamilton Island. Contention has existed as to exactly what islands are within the informally-named collective ‘Whitsunday Islands’, but what is certain is that they lie within the chain named the Cumberland Islands.