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.

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.

History of beauty contests

Choosing symbolic kings and queens for May Day and other festivities is an ancient custom in Europe in which beautiful young women symbolize their nation's virtues and other abstract ideas. The first modern American pageant was staged by P. T. Barnum in 1854, but his beauty contest was closed down by public protest—he previously held dog, baby, and bird beauty contests. He substituted daguerreotypes for judging, a practice quickly adopted by newspapers. Newspapers held photo beauty contests for many decades: In 1880, the first “Bathing Beauty Pageant" took place as part of a summer festival to promote business in Rehoboth Beach, Delaware. Contests became a regular part of summer beach life, with the most elaborate contest taking place in Atlantic City, New Jersey, where the “Fall Frolic” attracted women from many cities and towns.

The modern beauty pageant's origin is traceable to the Miss America Pageant, which was first held in Atlantic City in 1921, under the title "Inter-City Beauty Contest." The Miss America Pageant eventually included preliminary eliminations, an evening gown competition, musical variety shows, and judging by panel. Still, the contest was at first shunned by middle-class society. Pageants did not become respectable until World War II, when "beauty queens" were recruited to sell bonds and to entertain troops. Scholarships and talent competitions evoked even closer scrutiny of contestants’ morals and backgrounds.

Other major contests include the yearly Miss World competition (founded by Eric Morley in 1951), Miss Universe (founded in 1952), Miss International (founded in 1960) and Miss Earth (founded in 2001 with environmental awareness as its concern). These are considered the Grand Slam pageants, the four largest and most famous international beauty contests. Minor contests, such as the Miss Bondi contest in Australia, are common throughout the world in the summer months. During the 1950s, pageants thrived to promote county fairs and local products. For example, some of Raquel Welch's titles included "Miss Photogenic" and "Miss Contour." Across the world, women from around the world participate each year in local competitions for the chance to represent their country's international title.

Recently there has been a movement to the Internet Beauty Pageant format demonstrated by which aim to level the pageant playing field by allowing more variations in both contestants and judges. The organizers of the major beauty contests represent their contests as being events of world importance - and they are, in that they are viewed by over a billion people every year.