Ralph Willis AO is an Australian former politician who served as a Cabinet Minister during the entirety of the Hawke-Keating government from 1983 to 1996, most notably as Treasurer of Australia from 1993 to 1996 and briefly in 1991. He also served as Minister for Industrial Relations, Minister for Transport and Communications and Minister for Finance. He represented the Victorian seat of Gellibrand in the House of Representatives from 1972 to 1998.

The treasurer of Australia, also known as the Federal treasurer or simply the treasurer, is the minister of state of the Commonwealth of Australia charged with overseeing government revenue collection, federal expenditure and economic policy as the head of the Department of the Treasury. The current treasurer is Jim Chalmers, who was selected by Prime Minister Anthony Albanese in May 2022 following the 2022 Australian federal election.