The W. S. Cox Plate is a Group 1 Thoroughbred horse race for horses aged three years old and over under Weight for age conditions, over a distance of 2040 metres, that is held by the Moonee Valley Racing Club at Moonee Valley Racecourse, Melbourne, Australia in late October. The race has a purse of A$5,000,000.

Horse racing is an equestrian performance sport, typically involving two or more horses ridden by jockeys over a set distance for competition. It is one of the most ancient of all sports, as its basic premise – to identify which of two or more horses is the fastest over a set course or distance – has been mostly unchanged since at least classical antiquity.