Deputy Premier of South Australia

Deputy Premier of South Australia
Coat of arms of South Australia
Incumbent John Rau since 7 February 2011
Style	The Honourable
Appointer	Governor of South Australia
Term length	At the Governor's pleasure
Formation	26 March 1968
First holder	Des Corcoran

The Deputy Premier of South Australia is the second-most senior officer in the Government of South Australia. The Deputy Premiership is a ministerial portfolio in the Cabinet of South Australia, and the Deputy Premier is appointed by the Governor on the advice of the Premier of South Australia.

The current Deputy Premier since 2011 is John Rau of the South Australian Branch of the Australian Labor Party.

The office of Deputy Premier was created in March 1968. The first to serve in the position was Labor deputy leader Des Corcoran. Prior to that time the term was sometimes used unofficially for the second-highest ranking minister in the government, usually the Treasurer.

In both Labor and Liberal governments, the Deputy Premier is usually the party's deputy leader.

Two Deputy Premiers have subsequently become Premier in their own right: Des Corcoran and Rob Kerin. This last happened in 2001, when Rob Kerin became premier after John Olsen's resignation. Dean Brown did the reverse, becoming Deputy Premier to Rob Kerin, 5 years after his own premiership ended at the hands of John Olsen.

South Australia's longest-serving Deputy Premier is Kevin Foley, who served in the position from March 2002 to February 2011.

The duties of the Deputy Premier are to act on behalf of the Premier in his or her absence overseas or on leave. The Deputy Premier has additionally always held at least one substantive portfolio. It is possible for a minister to hold only the portfolio of Deputy Premier, but this has never happened.