Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It is the largest country in Oceania and the world's 6th-largest country by total area. The neighbouring countries are Papua New Guinea, Indonesia and East Timor to the north; the Solomon Islands and Vanuatu to the north-east; and New Zealand to the south-east. Australia's capital is Canberra, and its largest urban area is Sydney.
Australia has the world's 13th-largest economy and 9th-highest per capita income (IMF). With the 2nd-highest human development index globally, the country ranks highly in quality of life, health, education, economic freedom, and civil liberties and political rights. Australia is a member of the United Nations, G20, Commonwealth of Nations, ANZUS, Organisation for Economic Co-operation and Development (OECD), World Trade Organization, Asia-Pacific Economic Cooperation, and the Pacific Islands Forum. The population of 25 million is highly urbanised and heavily concentrated on the eastern seaboard. Australia has the world's 9th largest immigrant population, with immigrants accounting for 26% of the population.
Description by Wikipedia