Nepean Island is a small uninhabited
island located at , about 1 km south off a golf course on
Norfolk Island in the Southwest Pacific. It was named in 1788 by Lieutenant
Philip Gidley King for
Evan Nepean, Under Secretary of the Home Department of the
United Kingdom. It is part of the
Australian territory of Norfolk Island and is included in the
Norfolk Island National Park, as is nearby
Phillip Island, and about 10 per cent of Norfolk Island proper. The island is made of
calcareous rock dating from the late
Pleistocene and is a breeding site for several species of
seabirds. The island is uninhabited due to its small size and tall cliffs flanking it, making it nigh on impossible for boats to land there. It forms part of the Norfolk Island National Park, along with Norfolk Island and Phillip Island.