Australia is the world's sixth largest country, after Russia, Canada, China, USA, and Brazil. In addition to the mainland, Australia is surrounded by many thousands of small fringing islands and numerous larger ones, which amount to an area half the size of Tasmania. Area shown in square kilometres. States and territories are listed from the largest to smallest.
Percentage of total area: 33.0%
Mainland area: 2,526,786
Island area: 3,089
Total area: 2,529,875
Percentage of total area: 22.5%
Mainland area: 1,723,936
Island area: 6,712
Total area: 1,730,648
Percentage of total area: 17.5%
Mainland area: 1,335,936
Island area: 13,387
Total area: 1,349,129
Percentage of total area: 12.7%
Mainland area: 978,810
Island area: 4,672
Total area: 983,482
Percentage of total area: 10.4%
Mainland area: 800,628
Island area: 14
Total area: 800,642
Percentage of total area: 3.0%
Mainland area: 227,010
Island area: 404
Total area: 227, 416
Percentage of total area: 0.9%
Mainland area: 64,519
Island area: 3,882
Total area: 68,401
Percentage of total area: less than 1%
Mainland area: 2,358
Island area: nil
Total area: 2,358
Percentage of total area: less than 1%
Mainland area: 72
Island area: 1
Total area: 73
Percentage of total area: 100%
Mainland area: 7,659,861
Island area: 32,163
Total area: 7,692,024
Australia is responsible for administering seven external territories - Norfolk Island, the uninhabited Coral Sea Islands Territory, the Cocos (Keeling) Islands, Christmas Island, the uninhabited Ashmore and Cartier Islands Territory, the Territory of Heard Island and the McDonald Islands in the sub-Antarctic and the Australian Antarctic Territory.

Australia is one of about 210 countries. At 7,692,024 km2, it comprises just five percent of the world's land area (149,450,000 km2), yet it is the planet's sixth largest country after Russia, Canada, China, USA, and Brazil. Australia is also the smallest continental land mass (or largest island).
Whilst the areas of Canada and the United States are similar to Europe, their populations are markedly smaller, by factors of eighteen (3 persons per km2) and two (29 persons per km2) respectively. Australia is not far behind in size, but its population compared to Europe is 30 times smaller. Japan's population density is 336 persons per km2 and the United Kingdom's is 244 persons per km2, compared to Australia's 2.5 persons per km2.
Shows length of borders in kilometres
New South Wales: 4,635 km
Queensland: 3,339 km
South Australia: 3,185 km
Northern Territory: 3,179 km
Victoria: 2,541 km
Western Australia: 1,862 km
Australian Capital Territory: 32 km
Jervis Bay Territory: 32 km
Tasmania: 85 metres
New South Wales has the longest border of all the States and Territories. It adjoins Queensland, South Australia, Victoria, the Australian Capital Territory and Jervis Bay Territory, making a total of 4635 kilometres.
A little known fact is that there is a land border between Tasmania and Victoria. Straddling the declared parallel line of latitude of 39° 12' S separating the two states is Boundary Islet. This rocky outcrop in Bass Strait measures approximately 85 metres east-west by 160 metres north-south.
Size: The distance from Sydney, on the east coast, to Perth on the west coast is 3 to 4 day's drive at a distance of 4025 km by road, which is about a four-hour flight, or 3,279km as the crow flies.
Population: 23.9 million (estimated January 2016)
- Population Clock (estimated population today)
Language: English
International gateways: Sydney, Melbourne, Cairns, Brisbane, Adelaide, Perth, Townsville, Hobart and Darwin. Most major international air carriers fly to Australia.
Flying Times: To Sydney from London or Frankfurt around 22 hrs.; from Singapore around 7 hours; from Los Angeles around 14 hrs.