Joseph Lyons, Australian educator and politician, 10th Prime Minister of Australia (died 1939)

Joseph Aloysius Lyons was an Australian politician who served as the tenth prime minister of Australia, from 1932 until his death in 1939. He held office as the inaugural leader of the United Australia Party (UAP), having previously led the Tasmanian branch of the Australian Labor Party (ALP) before the Australian Labor Party split of 1931. He served as the 26th premier of Tasmania from 1923 to 1928.

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.