Miss USA 1984 was the 33rd Miss USA pageant, televised live from Lakeland Civic Auditorium, Lakeland, Florida on May 17, 1984. At the conclusion of the final competition, Mai Shanley of New Mexico was crowned Miss USA 1984. The outgoing titleholder was Julie Hayek of California.
The pageant was hosted by Bob Barker. It was the first time the pageant had been held in Florida since 1971, the last time the pageant had been held in its old home of Miami Beach.
In an odd occurrence, both women in the top two had previously competed at Miss America, neither one of whom placed at that pageant.
