Big Sandy Petrel Island is an island game reserve with an area of 15.2 ha, in south-eastern Australia.
It is part of the Petrel Island Group, lying in Bass Strait close to Walker and Robbins Islands in north-west Tasmania.
Recorded breeding seabird, shorebird and waterbird species include little penguin, short-tailed shearwater, Pacific gull, sooty oystercatcher, pied oystercatcher and Cape Barren goose.
Tiger snakes are present.
This Tasmania geography article is a stub.