Peter Costello

The Honourable Peter Costello AC
Official portrait, c. 1996
Treasurer of Australia
In office 11 March 1996 – 3 December 2007
Prime Minister	John Howard
Preceded by	Ralph Willis
Succeeded by	Wayne Swan
Deputy Leader of the Liberal Party
In office 23 May 1994 – 29 November 2007
Leader	Alexander Downer John Howard
Preceded by	Michael Wooldridge
Succeeded by	Julie Bishop
Member of the Australian Parliament for Higgins
In office 24 March 1990 – 19 October 2009
Preceded by	Roger Shipton
Succeeded by	Kelly O'Dwyer
Personal details
Born	Peter Howard Costello (1957-08-14) 14 August 1957 (age 66) Melbourne, Victoria, Australia
Political party	Liberal
Other political affiliations	Coalition
Spouse	Tanya Coleman ​ (m. 1982)​
Children	3
Relatives	Tim Costello (brother) Patrick Costello
Education	Carey Baptist Grammar School
Alma mater	Monash University
Profession	Barrister

Peter Howard Costello AC (born 14 August 1957) is an Australian businessman, lawyer and former politician who served as the treasurer of Australia in government of John Howard from 1996 to 2007. He is the longest-serving treasurer in Australia's history. Costello was a member of parliament (MP) of the Australian House of Representatives from 1990 to 2009, representing the Division of Higgins. He also served as the Deputy Leader of the Liberal Party from 1994 to 2007.

On 18 September 2008, Costello was appointed as chairman of the World Bank's new Independent Advisory Board (IAB) to provide advice on anti-corruption measures.^[1] Costello served as Chairman of Nine Entertainment from February 2016 until June 2024. Costello is Chairman of the Board of Guardians of Australian Future Fund.^[2]