Who Wants to Marry a Multi-Millionaire? is an American reality television special in which 50 women competed in a beauty pageant-style contest to marry a wealthy man whom they had never met, with the wedding being performed at the end of the program. The show was aired by Fox as a single two-hour broadcast on February 15, 2000 and was hosted by Jay Thomas.

The show was controversial, with both the feminist National Organization for Women and the conservative Media Research Center condemning the program. Following the broadcast, it was alleged that the supposed multi-millionaire, Rick Rockwell, had embellished claims about his professional and financial success, and it was subsequently found that he had been the subject of a restraining order from a previous partner, which had not been discovered by Fox during a background check. The contest's winner, Darva Conger, expressed regret for taking part in the program and her marriage to Rockwell was annulled.

In 2002, TV Guide ranked it number 25 on its "50 Worst TV Shows of All Time" list.