Zac Purton (born 3 Jan 1983) is a horse racing jockey. He won the Brisbane jockeys' premiership as an apprentice in 2003, moved to Sydney and was quickly amongst the top jockeys there before he began his Hong Kong career in 2007/08. In the 2013/14 season, Purton ended the 13-year championship reign of Douglas Whyte, becoming the first Australian jockey to win the Hong Kong title since Noel Barker in 1991. . (112 wins). He notched up 112 wins on his way to the title. Purton also raced to what was then the fastest 50 in Hong Kong history that season and became the second rider, after Whyte, to notch 100 wins in a season. Purton lost his title when he came second to João Moreira in 2014/15 with 95 wins then was runner-up to his Brazilian rival again in 2015-16 and 2016-17 before reclaiming the Hong Kong championship in 2017-18 in an epic battle.
With 854 career wins as a jockey in Hong Kong, Purton sits third on the list behind Whyte (1,791) and Anthony S. "Tony" Cruz (946).
He represented Hong Kong in the World Super Jockey Series held by Japan Racing Association in 2012, recording two wins and being crowned as champion. He won the prestigious Hong Kong Derby in 2015, with the John Size-trained Luger, and his Hong Kong Cup win on Time Warp in 2017 made Purton only the third jockey, after Gerald Mosse and Moreira, to have won all four of Hong Kong's December international races.