John Charles Bannon (7 May 1943 – 13 December 2015) was an Australian politician.
He was the 39th Premier of South Australia, leading the South Australian Branch of the Australian Labor Party from a single term in opposition back to government at the 1982 election.
Just as the Prime Ministry of Bob Hawke stressed cohesion and conflict resolution in a way that Gough Whitlam's had not, so Bannon's consensual approach to government differed markedly from the more obviously radical Don Dunstan era.
At the 1985 election Bannon's government was re-elected with an increased majority, but it was reduced to minority government status at the 1989 election.
In 1992 Bannon became Labor's longest-serving and South Australia's second longest-serving Premier.
As a result of the State Bank collapse, he resigned as Premier in 1992, and from parliament at the 1993 election landslide.