Chatham Island is located in the South Ward (Walpole) of Manjimup Shire in the Great Southern region of

Western Australia Western Australia (WA) is the westernmost state of Australia. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Aust ...

. It is approximately offshore from

D'Entrecasteaux National Park D'Entrecasteaux National Park is a national park in Western Australia, south of Perth. The park is named after the French Admiral Antoine Bruni d'Entrecasteaux who was the first European to sight the area and name Point D'Entrecasteaux in 1792. ...

and offshore from Mandalay Beach. Declared a class 1A Nature reserve in 1973, the island has a total area of . Named as Cape Chatham by

George Vancouver Captain (Royal Navy), Captain George Vancouver (; 22 June 1757 – 10 May 1798) was a Royal Navy officer and explorer best known for leading the Vancouver Expedition, which explored and charted North America's northwestern West Coast of the Uni ...

aboard HMS ''Discovery'' in 1791, the island was subsequently renamed as Chatham Island.

References

{{reflist Nature reserves in Western Australia Islands of the Great Southern (Western Australia)