John Frederick Lewis RA (London 14 July 1804 - 15 August 1876) was an British painter. He specialized in Oriental and Mediterranean scenes in exquisitely detailed watercolour or oils.
Lewis lived for several years in a traditional mansion in Cairo, and (after his return to England) painted highly detailed works showing both realistic Genre scenes of Middle Eastern life and more idealized scenes in upper class Egyptian interiors with no traces of Western cultural influence yet apparent.