Republicanism in Australia

Republicanism in Australia is a movement to change Australia's system of government from a constitutional monarchy to a republic; presumably, a form of parliamentary republic that would replace the monarch of Australia (currently King Charles III) with a non-royal Australian head of state. It is opposed to monarchism in Australia. Republicanism was first espoused in Australia before Federation in 1901. After a period of decline following Federation, the movement again became prominent at the end of the 20th century after successive legal and socio-cultural changes loosened Australia's ties with the United Kingdom.

Republicanism is officially supported by the Labor Party and the Greens, and is also supported by some Liberal Party members of the Australian Parliament. There was an assistant minister for the republic from 1 June 2022 until 28 July 2024. In a referendum held in 1999, Australian voters rejected a proposal to establish a republic with a parliamentary appointed head of state. This was despite polls showing a majority of Australians supported a republic in principle for some years before the vote.