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.

The monarchy of Australia is a key component of Australia's form of government, embodied by the Australian sovereign and head of state. The Australian monarchy is a constitutional one, modelled on the Westminster system of parliamentary government, while incorporating features unique to the constitution of Australia.