The Big Caroline Rock is an unpopulated island located close to the south-western coast of Tasmania, Australia.

Situated near where the mouth of Port Davey meets the Southern Ocean, the 2.2-hectare (5.4-acre) island is part of the Swainson Islands Group, and comprises part of the Southwest National Park and the Tasmanian Wilderness World Heritage Site.

[1][2] The island is part of the Port Davey Islands Important Bird Area, so identified by BirdLife International because of its importance for breeding seabirds.

[3] Recorded breeding seabird species are the short-tailed shearwater (15,000 pairs), fairy prion (1-2000 pairs) and silver gull.

This Tasmania geography article is a stub.