A beauty contest, or beauty pageant, is a competition based mainly, though not always entirely, on the physical beauty of its contestants, and often incorporating personality, talent demonstration, and question responses as judged criteria. Almost invariably, competitions for men and women are separate events, and those for men are not referred to as beauty contests. Beauty contests for women are more common, and winners are called beauty queens. Beauty contests for men, like Mr. Universe, are more likely to be "body building" contests—quite unlike the traditional "beauty contest" in which women are judged upon many attributes both physical and otherwise. However, in the 1990s, male "beauty contests" began to shift focus. Instead of only considering muscle mass, the competitions began to judge the natural physical attributes of the contestants as well as their physiques. These include Mr. World and Manhunt International.

There are also beauty contests for children. These events are often controversial, particularly when children are dressed provocatively and described in adult terms. Long and tiring rehearsals of singing and dancing to loud music are said to harm the health and development of the children-participants.