Tom Koutsantonis

The Honourable
Tom Koutsantonis
MP
The Honourable Tom Koutsantonis MP
Treasurer of South Australia
	Incumbent
	Assumed office ; 19 September 2025
Premier	Peter Malinauskas
Preceded by	Stephen Mullighan
	In office; 26 March 2014 – 19 March 2018
Premier	Jay Weatherill
Preceded by	Jay Weatherill
Succeeded by	Rob Lucas
Minister for Energy and Mining
	Incumbent
	Assumed office ; 24 March 2022
Premier	Peter Malinauskas
Preceded by	Dan van Holst Pellekaan
	In office; 8 February 2011 – 19 March 2018
Premier	Jay Weatherill
Preceded by	Paul Holloway
Succeeded by	Dan van Holst Pellekaan
Minister for Infrastructure and Transport
	In office; 24 March 2022 – 19 September 2025
Premier	Peter Malinauskas
Preceded by	Corey Wingard
Succeeded by	Emily Bourke
	In office; 21 January 2013 – 26 March 2014
Premier	Jay Weatherill
Preceded by	Pat Conlon
Succeeded by	Stephen Mullighan
Father of the ; Parliament of South Australia
	Incumbent
	Assumed office ; 19 March 2022
Preceded by	Rob Lucas
Premier	In office; 26 March 2014 – 27 May 2014
Other offices held
Minister for Automotive Transformation
	In office; 26 March 2014 – 27 May 2014
Premier	Jay Weatherill
Preceded by	office established
Succeeded by	Susan Close
Minister for Small Business
	In office; 26 March 2014 – 19 January 2016
Premier	Jay Weatherill
Preceded by	Tom Kenyon
Succeeded by	Martin Hamilton-Smith
	In office; 25 March 2010 – 21 January 2013
Premier	Mike Rann; Jay Weatherill
Preceded by	Russell Wortley
Succeeded by	Tom Kenyon
Minister for Housing & Urban Development
	In office; 21 January 2013 – 26 March 2014
Premier	Jay Weatherill
Preceded by	Pat Conlon
Succeeded by	John Rau
Minister for Industry & Trade
	In office; 25 March 2010 – 21 January 2013
Premier	Mike Rann; Jay Weatherill
Preceded by	Rory McEwen
Succeeded by	Tom Kenyon
Minister of Correctional Services
	In office; 3 March 2009 – 21 October 2011
Premier	Mike Rann
Preceded by	Carmel Zollo
Succeeded by	Jennifer Rankine
Minister for Gambling
	In office; 3 March 2009 – 8 February 2011
Premier	Mike Rann
Preceded by	Carmel Zollo
Succeeded by	position abolished
Minister for Youth & Volunteers
	In office; 3 March 2009 – 25 March 2010
Premier	Mike Rann
Preceded by	Paul Caica (Youth); Jennifer Rankine (Volunteers)
Succeeded by	Ian Hunter
Minister for Road Safety
	In office; 3 March 2009 – 20 April 2009
Preceded by	Carmel Zollo
Succeeded by	Michael O'Brien
Member of the South Australian Parliament; for West Torrens; Peake (1997–2002)
	Incumbent
	Assumed office ; 11 October 1997
Preceded by	Heini Becker
Personal details
Born	Anastasios Koutsantonis; 23 August 1971; Woodville, South Australia
Party	Australian Labor Party (SA)
Spouse	Anthea (m. 2009)
Religion	Greek Orthodox
Website	www.tomkoutsantonismp.com.au

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Anastasios "Tom" Koutsantonis (born 23 August 1971) is an Australian politician in the South Australian Branch of the Australian Labor Party, representing the seats of West Torrens (2002−current) and Peake (1997−2002) as a Labor member in the South Australian House of Assembly. As of September 2025 he is Treasurer of South Australia and Minister for Energy and Mining in the Malinauskas ministry.

Koutsantonis served as Treasurer and minister for other portfolios in the Weatherill cabinet between 2011 and 2018. From March 2022, Koutsantonis served as the Minister for Infrastructure and Transport and the Minister for Energy and Mining in the Malinauskas ministry. On 19 September 2025, in a Cabinet reshuffle owing to the resignation of two front benchers, he was once again appointed Treasurer. He retains the portfolio of energy and mining, but lost the infrastructure and transport portfolio.