Tasmania, abbreviated as Tas and known colloquially as "Tassie", is an island state that is part of the Commonwealth of Australia. It is located 240 kilometres (150 mi) to the south of the Australian mainland, separated by Bass Strait. The state includes the main island of Tasmania, the 26th largest island in the world, and the surrounding 334 islands. The state has a population of 507,626 (as of June 2010), almost half of which resides in the Greater Hobart precinct, which forms the metropolitan area of the state capital and largest city Hobart.

Tasmania's area is 68,401 square kilometres (26,410 sq mi), of which the main island covers 64,519 square kilometres (24,911 sq mi).Tasmania is promoted as a natural state; almost 45% of Tasmania lies in reserves, national parks and World Heritage Sites and the state was the founding place of the first environmental party in the world.

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