The Treasurer of South Australia is the minister of the Government of South Australia charged with overseeing government revenue collection, expenditure and economic policy as the head of the Department of Treasury and Finance. The current treasurer is Tom Koutsantonis, who was selected by Premier Peter Malinauskas in September 2025 during a reshuffle of the ministry.
The treasurer is responsible for the financial management of the state of South Australia.
Since 28 July 2020 and the Urban Renewal Authority, trading as Renewal SA, has been within the treasurer's portfolio. Renewal SA is responsible for undertaking, supporting and promoting urban development and urban renewal that aligns to the government's strategic plan, in particular the 30-Year Plan for Greater Adelaide (2017).
The following is a list of treasurers of South Australia, from 1839 to present. As self-government and the Parliament of South Australia began in 1857, no official parliament record was kept and no definite evidence of the official holder of the office could be found prior to that year.