The Theo Marks Stakes is an Australian Turf Club Group 2 Thoroughbred quality handicap horse race, for horses aged three years old and older, over a distance of 1300 metres, held annually at Rosehill Racecourse, Sydney, Australia in September.
[1] Total prizemoney for the race is A$250,000.
The race is named after Theodore John Marks, architect and chairman of the Rosehill Racing Club (1919-41).
[2] † Not held because of outbreak of equine influenza[42]