Mount Ossa is the highest mountain of which island?

Mount Ossa is the highest mountain in Tasmania, with a summit elevation of 1,617 metres (5,305 ft) above sea level. It makes up part of the Pelion Range within Cradle Mountain-Lake St Clair National Park in the Central Highlands region of Tasmania, Australia.

It was first surveyed by Europeans in the 1860s, and confirmed to be the state's high point in 1954. It was first surveyed by Charles Gould and named after Mount Ossa in Greece following the theme of classical Greek names set by George Frankland, an early Tasmanian surveyor.

Tasmania is an island state of Australia. It is located 240 kilometres (150 miles) to the south of the Australian mainland, separated from it by the Bass Strait, with the archipelago containing the southernmost point of the country.