John McCormack is a former Australian racing driver. Originally from Tasmania, McCormack became one of the leading Formula 5000 racers in Australia during the 1970s. McCormack won the Australian Drivers' Championship three times, driving an Elfin MR5 Repco Holden in 1973, an Elfin MR6 Repco Holden in 1975 and a McLaren M23-Leyland in 1977. He also won consecutive New Zealand Grand Prix in 1973 and 1974. McCormack was competitive in the Tasman Series and Australian Grand Prix his best results being second in both events. Most of McCormack's major wins were under the banner of the Ansett Team Elfin.