Australia is close to 2,500 miles wide between its eastern and western extremities. Australia's difference between total length and width is only about 200 miles. The entire land area of Australia is close to 4.8 million square miles.
The entire land area of Australia is close to that of the United States, with the exclusion of Alaska. Australia's size is 50 percent greater than Europe, and Australia is the driest continent aside from Antarctica. Australia's landforms are many millions of years old, providing for a very unique geography. Australia has a population of over 20 million people, with the vast majority living in the largest continental cities.