The ISO code of Australia is AU according to the ISO 3166 standard. The local name of the country is the same as its English name. Australia capital city is Canberra. People in Australia speak the English language. On 1 January 1901, Australia emerged as a sovereign political entity. In the year 01/01/1901, Australia emerged as a sovereign political entity. The largest cities in Australia are Sydeny, Melbourne, Brisbane, Perth.