John Dunning, American author
John Dunning may refer to:
John Dunning (businessman) (born 1934), British businessman, founder of Westmorland Motorway Services
John Dunning (detective fiction author) (born 1942), American writer of detective fiction
John Dunning (true crime author) (1918–1990), true crime author
John Dunning (snooker player) (1927–2009), English professional snooker player
John Harry Dunning (1927–2009), British economist
John Dunning (film editor) (1916–1991), American film editor
John Dunning (film producer) (1927–2011), Canadian film producer
John R. Dunning (1907–1975), American physicist
Jack Dunning (John Angus Dunning, 1903–1971), New Zealand Test cricketer
John Dunning, 1st Baron Ashburton (1731–1783), English lawyer and politician
John Dunning (volleyball) (born 1950), American volleyball coach