Former SA Premier John Bannon has died in hospital aged 72

Former South Australian Premier John Bannon has died in hospital surrounded by his family after a long battle with severe illness.

SA Premier Jay Weatherill confirmed the 72-year-old's death this afternoon. Mr Bannon was Premier from 1982 to 1992.

"John was the Labor Party's longest-serving State Premier. He served South Australia with great distinction and integrity," he said.

"I regarded John as a great friend and mentor and I am deeply saddened by his passing, as are so many of his friends and former colleagues in the South Australian Parliament."

Mr Weatherill said he has spoken to Mr Bannon's wife Angela to offer his "deep condolences" and offer the family a state funeral on behalf of the people of South Australia.