David McKenzie (15 July 1936 – 10 August 1981) was an Australian fencer. He competed at the 1956, 1960 and 1964 Summer Olympics. He was an International Olympic Committee member from 1974 to 1981. He replaced Lewis Luxton who had resigned. McKenzie gained notoriety for encouraging Dennis Tutty to go to court to challenge rugby league's restraint of trade clauses, a case that would change professional sport in Australia. "How Olympic fencer David McKenzie helped Dennis Tutty change the course of rugby league".