John Marshall Buchanan (born 5 April 1953) is the former World Cup winning coach of the Australia national cricket team and of Kolkata Knight Riders team in the Indian Premier League.
John Buchanan is a King's Old Collegian (University of Queensland, Brisbane) and is also an old boy of The Southport School, located in Gold Coast, Queensland, Australia.
Buchanan is also known in cricketing circles as 'Ned Flanders', due to his similarity in appearance to The Simpsons character.