Ronald Joseph Ryan was the last person to be legally executed in Australia. Ryan was found guilty of shooting and killing warder George Hodson during an escape from Pentridge Prison, Victoria, in 1965. Ryan's hanging was met with public protests by those opposed to capital punishment. Capital punishment was abolished in all states by 1985.

Capital punishment in Australia has been abolished in all jurisdictions since 1985. Queensland abolished the death penalty in 1922. Tasmania did the same in 1968. The Commonwealth abolished the death penalty in 1973, with application also in the Australian Capital Territory and the Northern Territory. Victoria did so in 1975, South Australia in 1976, and Western Australia in 1984. New South Wales abolished the death penalty for murder in 1955, and for all crimes in 1985. In 2010, the Commonwealth Parliament passed legislation prohibiting the re-establishment of capital punishment by any state or territory. Australian law prohibits the extradition or deportation of a prisoner to another jurisdiction if they could be sentenced to death for any crime.