Arch Rock is a sandstone islet, with an area of 0.44 ha and containing a natural arch, in south-eastern Australia. It is part of the Partridge Island Group, lying close to the south-eastern coast of Tasmania, in the D'Entrecasteaux Channel between Bruny Island and the mainland.[1]
Recorded breeding seabird species are Pacific gull and kelp gull. The metallic skink is present.[1]
The other islands in the Partridge Island Group: