Phillip Island is an island located 6 km (3.7 mi) south of Norfolk Island in the Southwest Pacific, and is part of the Norfolk Island group. It was named in 1788 by Lieutenant Philip Gidley King after Arthur Phillip, the first Governor of New South Wales. Phillip Island is part of the Australian external territory of Norfolk Island, and is included in Norfolk Island National Park, as is neighbouring Nepean Island and about 10 percent of Norfolk Island proper.

Norfolk Island National Park is a protected area of 6.50 km2 (2.51 sq mi) located at 29°2′0″S 167°56′59″E in the South Pacific Ocean, about 1,471 kilometres off the East coast of Australia. The park’s area includes the Mount Pitt section on the namesake Norfolk Island with an area of 4.60 km2 (1.78 sq mi) / 460 ha, as well as the neighboring Phillip Island encompassing 1.90 km2 (0.73 sq mi) / 190 ha, and the much smaller Nepean Island. The Norfolk Island group is a Commonwealth of Australia external territory, and is the only place in the world where the Norfolk Island parakeet and the white-chested white-eye occur.