Cape Barren Island (indigenous name: Truwana), part of the Furneaux Group, is a 478-square-kilometre (185 sq mi) island located in the Bass Strait, off the north east coast of Tasmania, Australia. The largest island of the Furneaux Group, Flinders Island, lies to the north, with the smaller Clarke Island to the south. The highest point on the island is Mount Munro at 715 metres (2,346 ft). Mount Munro is probably named after James Munro (c. 1779-1845), a former convict and then sealer, who lived from the 1820s for more than 20 years with several women on nearby Preservation Island.
The south-eastern point of the island was named Cape Barren by Tobias Furneaux in HMS Adventure in March 1773.
The population of the island numbered 268 in 2006, most of them in the settlement Cape Barren Island, also called The Corner, on the northwest coast.
Australia's only native goose, the Cape Barren goose, was first documented by European explorers on this island.