Joseph Whidbey FRS (1757 – 9 October 1833) was a member of the Royal Navy who served on the Vancouver Expedition 1791–95, and later achieved renown as a naval engineer. He is notable for having been the first European to discover and chart Admiralty Island in the Alexander Archipelago in 1794. Little is recorded of Whidbey's life before his warranting as a sailing master in 1779. After years of service during the War of American Independence, he received a peacetime appointment to HMS Europa, where with then-Lieutenant George Vancouver, he conducted a detailed survey of Port Royal.