The R. N. Irwin Stakes is a South Australian Jockey Club Group 3 Weight for Age Thoroughbred horse race for three year olds and older, run over a distance of 1100 metres at Morphettville Racecourse, Adelaide, Australia in the autumn.
[1] Total prize money for the race is A$127,250.
The race was originally run in January but was moved to March as part of the change in dates for the Adelaide Cup carnival in 2006.
[2] The race was moved again in 2012 to April and the race is now a lead up preparation race for the Goodwood Handicap.
[3]