Joseph Cook, English-Australian miner and politician, 6th Prime Minister of Australia (born 1860)

Sir Joseph Cook was an Australian politician and trade unionist who served as the sixth prime minister of Australia from 1913 to 1914. He held office as the leader of the Liberal Party, having previously been leader of the Anti-Socialist Party from 1908 to 1909. His victory at the 1913 election marked the first time that a centre-right party had won a majority at an Australian federal election.

The prime minister of Australia is the head of government of the Commonwealth of Australia. The prime minister is the chair of the Cabinet of Australia and thus the head of the federal executive government. Under the principles of responsible government, the prime minister is both responsible to and a member of the Commonwealth Parliament. The current prime minister is Anthony Albanese of the Australian Labor Party, who assumed the office on 23 May 2022.