The Australian honours and awards system refers to all orders, decorations, and medals, as instituted by letters patent from the Monarch of Australia and countersigned by the Australian prime minister at the time, that have been progressively introduced since 14 February 1975. The Australian honours and awards system excludes all state and local government, and private, issued awards and medals (although a few can be recognised in the order of wearing, including the Order of St John).
Honours and awards have been present in Australia since pre-federation, primarily from the Imperial honours and awards system. This Imperial system remained in place until its full phase out in 1994 (although the Monarch of Australia may still confer some of these honours to Australians in their personal capacity). Between 1975 and 1992, the Australian honours and awards system and the Imperial honours and awards system operated in parallel, although the last Imperial awards to be made were in June 1989.