Hippolyte Rocks is a small granite island, with an area of 5.3 ha, in south-eastern Australia. It is part of the Tasman Island Group, lying close to the south-eastern coast of Tasmania around the Tasman Peninsula. It has a flat top and is surrounded by steep cliffs up to 65 m in height. It is part of the Tasman National Park.
Recorded breeding seabird species are Little Penguin, Short-tailed Shearwater, Sooty Shearwater, Fairy Prion, Common Diving-Petrel, Silver Gull and Black-faced Cormorant. Australian Fur Seals use the island as a haul-out site. The Metallic Skink is present. Together, Hippolyte Rocks and the nearby Thumbs have been identified by BirdLife International as an Important Bird Area (IBA) because they support over 1% of the World population of Black-faced Cormorants.