Rottnest Island is located 18 kilometres (11 mi) off the Western Australian coast, near Fremantle. It is called Wadjemup by the Noongar people, meaning "place across the water". The island is 11 kilometres (6.8 mi) long, and 4.5 kilometres (2.8 mi) at its widest point. Its total land area is 19 square kilometres (7.3 sq mi). Rottnest Island has been a popular local holiday destination for over 50 years.
The Western Australian vernacular diminutive is "Rotto", or "Rottnest".
In 1917 Rottnest Island was declared an A-Class Reserve under the Permanent Reserve Act 1899 and the Rottnest Board of Control was formed, known today as the Rottnest Island Authority. No private ownership of land is allowed. The authority collects revenue by imposing a landing fee on all visitors to the island as well as managing holiday rental accommodation