- Full name: Commonwealth of Australia
Population: 21.5 million (UN, 2009)
Capital: Canberra
Largest city: Sydney
Area: 7.7 million sq km (2.9 million sq miles)
Major language: English
Major religion: Christianity
Life expectancy: 79 years (men), 84 years (women) (UN)
Monetary unit: 1 Australian dollar = 100 cents
Main exports: Ores and metals; wool, food and live animals; fuels, transport machinery and equipment
GNI per capita: US $32,220
Internet domain: .au
International dialing code: +61
Other Cities: Adelaide, Brisbane (1.6 million) Darwin, Hobart, Melbourne , Sydney , Perth .

The climate in Australia is Relatively dry, ranging from temperate in the south to tropical in the north.

Australia is a developed country and one of the wealthiest in the world, with theworld's twelfth largest economy. Australia ranks highly in many international comparisons of national performance, such as quality of life, health, education, economic freedom, and the protection of civil liberties and political rights.

Australia is a constitutional monarchy with a federal division of powers. It uses a parliamentary system of government with Queen Elizabeth II at the top and as the Queen of Australia, a role that is distinct from her position as monarch of the other Common wealth countries. The Queen resides in the United Kingdom, and she is represented by her viceroys in Australia.

Australia is a wealthy country, it generates its income from various sources including mining-related exports, telecommunications, banking and manufacturing. It has a market economy, a relatively high GDP per capita, and a relatively low rate of poverty. In terms of average wealth, Australia ranked second in the world in 2013.

Although Australia has no official language, English has always been the national language.