David Andrew Hayes (born 22 October 1962) is an Australian Thoroughbred racehorse trainer who has total of 95 Group One wins in his name, (77 in Australia, 17 in Hong Kong and one in Japan) including winner of the Melbourne Cup, Cox Plate, Caulfield Cup and Golden Slipper.
Hayes became the youngest member to be admitted into the Australian Racing Hall of Fame in 2008.
William Hayes, who played in the VFL and AFL is involved in the family training business along with David's daughter Sophie.
He grew up in Angaston in the Barossa Valley and attended St Peter’s College as a boarder.
He was a promising Australian Rules Footballer, playing for SANFL club Central Districts before retiring at 20 to pursue his career in racing.