Australia’s national currency is the Australian dollar which comes in denominations of $5, $10, $20, $50 and $100 notes. Australia’s national currency is the Australian dollar which comes in denominations of $5, $10, $20, $50 and $100 notes. Dollars and Cents  Coins come in 5, 10, 20 and 50 cent and one and two dollar denominations. Our colourful notes depict famous Australians both past and present.