The 2003 Melbourne Cup was the 143rd running of the Melbourne Cup, a prestigious Australian Thoroughbred horse race. The race, run over 3200 m, was held on 4 November 2003 at Melbourne's Flemington Racecourse. It was won by Makybe Diva at the age of five, trained by David Hall and ridden by Glen Boss. The 2003 race featured the first appearance by an Australian female jockey in the Melbourne Cup with Clare Lindop finishing 19th on Debben for Leon Macdonald. Maree Lyndon from New Zealand was the first female jockey in the Melbourne Cup, when she rode Argonaut Style in 1987.

Field

This is a list of horses which ran in the 2003 Melbourne Cup.