The Protectionist Party, also known as the Protectionist Liberal Party or Liberal Protectionist Party, was an Australian political party, formally organised from 1887 until 1909, with policies centred on protectionism. The party advocated protective tariffs, arguing it would allow Australian industry to grow and provide employment. It had its greatest strength in Victoria and in the rural areas of New South Wales. Its most prominent leaders were Sir Edmund Barton and Alfred Deakin, who were the first and second prime ministers of Australia.

The politics of Australia operates under the written Australian Constitution, which sets out Australia as a constitutional monarchy, governed via a parliamentary democracy in the Westminster tradition. Australia is also a federation, where power is divided between the federal government and the states and territories. The monarch, currently King Charles III, is the head of state and is represented locally by the Governor-General of Australia, while the head of government is the Prime Minister of Australia, currently Anthony Albanese.