Australia

Commonwealth of Australia

Flag	Coat of arms

Anthem: "Advance Australia Fair"^{[N 1]}

Capital		Canberra 35°18.48′S 149°7.47′E
Largest city		Sydney
Official language(s)		None[N 2]
National language		English (de facto)[N 2]
Demonym		Australian, Aussie[3][4]
Government		Federal parliamentary constitutional monarchy
-	Monarch	Elizabeth II
-	Governor-General	Quentin Bryce
-	Prime Minister	Julia Gillard
Legislature		Parliament
-	Upper house	Senate
-	Lower house	House of Representatives
Independence		from the United Kingdom
-	Constitution	1 January 1901
-	Statute of Westminster	11 December 1931
-	Statute of Westminster Adoption Act	9 October 1942 (with effect from 3 September 1939)
-	Australia Act	3 March 1986
Area
-	Total	7,617,930 km2 (6th) 2,941,299 sq mi
Population
-	2012 estimate	22,932,091[5] (52nd)
-	2006 census	19,855,288[6]
-	Density	2.8/km2 (233rd) 7.3/sq mi
GDP (PPP)		2011 estimate
-	Total	$914.482 billion[7] (18th)
-	Per capita	$40,234[7] (12th)
GDP (nominal)		2011 estimate
-	Total	$1.488 trillion[7] (13th)
-	Per capita	$65,477[7] (5th)
Gini (2006)		30.5[8] (medium)
HDI (2011)		0.929[9] (very high) (2nd)
Currency		Australian dollar (AUD)
Time zone		various[N 3] (UTC+8 to +10.5)
-	Summer (DST)	various[N 3] (UTC+8 to +11.5)
Date formats		dd-mm-yyyy
Drives on the		left
ISO 3166 code		AU
Internet TLD		.au
Calling code		+61

Australia, officially the Commonwealth of Australia,^[10] is a country in the Southern Hemisphere comprising the mainland of the Australian continent as well as the island of Tasmania and numerous smaller islands in the Indian and Pacific Oceans.^{[N 4]} It is the world's sixth-largest country by total area. Neighbouring countries include Indonesia, East Timor and Papua New Guinea to the north; the Solomon Islands, Vanuatu and New Caledonia to the north-east; and New Zealand to the south-east.
For at least 40,000 years^[12] before European settlement in the late 18th century, Australia was inhabited by indigenous Australians,^[13] who belonged to one or more of roughly 250 language groups.^[14][15] After discovery by Dutch explorers in 1606, Australia's eastern half was claimed by Great Britain in 1770 and settled through penal transportation to the colony of New South Wales from 26 January 1788. The population grew steadily in subsequent decades; the continent was explored and an additional five self-governing Crown Colonies were established.

On 1 January 1901, the six colonies federated, forming the Commonwealth of Australia. Since Federation, Australia has maintained a stable liberal democratic political system which functions as a federal parliamentary democracy and constitutional monarchy. The federation comprises six states and several territories. The population of 22.9 million is heavily concentrated in the Eastern states and is highly urbanised.
A highly developed country, Australia is the world's 13th-largest economy and has the world's fifth-highest per capita income. Australia's military expenditure is the world's 13th-largest. With the second-highest human development index globally, 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.^[16] Australia is a member of the G20, OECD, WTO, APEC, UN, Commonwealth of Nations, ANZUS, and the Pacific Islands Forum.