John Fleming (12 June 1919 – 29 May 2001) was a British art historian, known for his writing partnership with Hugh Honour.
Fleming's Robert Adam and His Circle in Edinburgh and Rome (1961) won the Bannister Fletcher Prize and the Alice Davis Hitchcock Medal.
He was educated at Rugby School and read English at Trinity College, Cambridge where he met Hugh Honour, who would become Fleming's life partner.
He travelled to Italy and during World War II was briefly a conscientious objector before entering the British Army Intelligence Corps in Cairo.
Living in Asolo near Venice, Honour and Fleming began a productive writing partnership.