The deputy prime minister of Australia is the deputy chief executive and the second highest ranking officer of the Australian Government. The office of deputy prime minister was officially created as a ministerial portfolio in 1968, although the title had been used informally for many years previously. The deputy prime minister is appointed by the governor-general on the advice of the prime minister. When Australia has a Labor government, the deputy leader of the parliamentary party holds the position of deputy prime minister. When Australia has a Coalition government, the Coalition Agreement mandates that all Coalition members support the leader of the Liberal Party becoming prime minister and the leader of the National Party becoming the deputy prime minister.

The Liberal–National Coalition, commonly known simply as the Coalition or the LNP, is an alliance of centre-right to right-wing political parties that forms one of the two major groupings in Australian federal politics. The two partners in the Coalition are the Liberal Party of Australia and the National Party of Australia. Its main opponent is the Australian Labor Party (ALP); the two forces are often regarded as operating in a two-party system. The Coalition was last in government from 2013 to 2022. The group is led by Peter Dutton, who succeeded Scott Morrison after the 2022 federal election.