Etienne Livingston de Mestre (9 April 1832 – 22 October 1916), was a 19th-century Australian breeder and jockey of Thoroughbred racehorses, De Mestre, was Australia's first outstanding racehorse trainer and racing identity. In his 30-year career he experienced all the highs and the lows of the turf in a career which ended with him dependent on donations from racing friends.