Australia, officially called the Commonwealth of Australia, is a country and sovereign state in the southern hemisphere, located on its own continent between the Pacific Ocean and the Indian Ocean. Its capital city is Canberra, and its largest city is Sydney.
Australia is the sixth biggest country in the world by land area, and is part of the Oceanic and Australasian regions. Australia, New Zealand, New Guinea and other islands on the Australian tectonic plate are together called Australasia, which is one of the world’s great ecozones. When other Pacific islands are included with Australasia, it is called Oceania.