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Official nameCommonwealth of AustraliaCapitalCanberraPopulation estimate (2015)23·97 millionInternet domain extension.auCurrencyThe Australian dollar (AUD) is divided into 100 cents.TerritoryAustralia, excluding external territories, covers a land area of 7,692,024 square kilometres, extending from Cape York in the north some 3,680 km to South East Cape, Tasmania; and from Cape Byron, New South Wales in the east some 4,000 km west to Steep Point, Western Australia.LanguageThe national language is English.Source: The Statesman's Yearbook 2018. Palgrave Macmillan, London Synonyms and related words