Oscar Grenville Hastings McKenzie (17 September 1922, British Guiana – December 1999, Spain), known as Mike McKenzie, was a Guyanese jazz pianist, bandleader, vocalist, composer and arranger, who performed in London from the 1950s to the 1980s. He covered a wide repertoire, from Habanera and Calypso, to trad jazz, swing and jazz standards. He led The Mike McKenzie Trio, Quartet and Quintet; Mike McKenzie's Habaneros; Mike McKenzie and his Rhythm; and The Mike McKenzie All Stars.