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

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

. 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 Bruni D'Entrecasteaux who was the first European to sight the area and name Point D'Entrecasteaux in 1792. The pa ...

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 George Vancouver (22 June 1757 – 10 May 1798) was a British Royal Navy officer best known for his 1791–1795 expedition, which explored and charted North America's northwestern Pacific Coast regions, including the coasts of what a ...

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)