The 1991 Melbourne Cup was a two-mile handicap horse race which took place on Tuesday, 5 November 1991. The race was run over , at Flemington Racecourse.
The Cup was won by the New Zealand bred mare Let's Elope and was the ninth of Bart Cummings' twelve victories in the event. It was the only win by Steven King in the Melbourne Cup.
Let's Elope had previously won the Turnbull Stakes, Caulfield Cup and Mackinnon Stakes in a row and went into the race as the 3/1 favourite on a fast track. She won by 2.5 lengths from the fast finishing Shiva's Revenge who was also trained by Bart Cummings, with Magnolia Hall third.
Field
This is a list of horses which ran in the 1991 Melbourne Cup.