The 1900 Summer Olympics (), today officially known as the Games of the II Olympiad () and also known as Paris 1900, were an international multi-sport event that took place in Paris, France, from 14 May to 28 October 1900. No opening or closing ceremonies were held.

At the Sorbonne conference of 1894, Pierre de Coubertin proposed that the Olympic Games should take place in Paris in 1900. However, the delegates to the conference were unwilling to wait six years, and lobbied to hold the first games in 1896. A decision was made to hold the first Olympic Games in 1896 in Athens and have Paris host the second Games.

1900 Summer Olympics

The Games were held as part of the 1900 World's Fair. In total, 1226 competitors took part in 19 different sports. This number relies on certain assumptions about which events were and were not "Olympic". Many athletes, some of whom had won events, were unaware that they had competed in the Olympic Games. Women took part in the games for the first time, with sailor Hélène de Pourtalès, born Helen Barbey in New York City, becoming the first female Olympic champion. The decision to hold competitions on a Sunday brought protests from many American athletes, who traveled as representatives of their colleges and were expected to withdraw rather than compete on their religious day of rest.

1900 Summer Olympics

Most of the winners in 1900 did not receive medals, but were given cups or trophies. Professionals competed in fencing, as was tradition, and Albert Robert Ayat (France), who won the épée for amateurs and masters, was awarded a prize of 3000 francs. Some events were contested for the only time in the history of the Games, including automobile and motorcycle racing, ballooning, cricket, croquet, Basque pelota, and 200m swimming obstacle race and underwater swimming. This was also the only Olympic Games in history to use live animals (pigeons) as targets during the shooting event. The host nation of France fielded 72% of all athletes (720 of the 997) and won the most gold, silver and bronze medal placings. U.S. athletes won the second-most in each, while fielding the fifth most participants, 75. British athletes won the third-most in each, while fielding the second most participants, 102.

1900 Summer Olympics

Organization

The 1900 Games were held as part of the 1900 Exposition Universelle. The Baron de Coubertin believed that this would help public awareness of the Olympics and submitted elaborate plans to rebuild the ancient site of Olympia, complete with statues, temples, stadia and gymnasia. The director of the Exposition Universelle, Alfred Picard, thought holding an ancient sport event at the Exposition Universelle was an "absurd anachronism". After thanking de Coubertin for his plans, Picard filed them away and nothing more came of it.

A committee was formed for the organization of the Games, consisting of some of the more able sports administrators of the day and a provisional program was drawn up. Sports to be included at the games were track and field athletics, swimming, wrestling, gymnastics, fencing, French and British boxing, river and ocean yacht racing, cycling, golf, lifesaving, archery, weightlifting, rowing, diving, and water polo.

British and Irish sports associations announced a desire to compete, as did a number of powerful American universities and sports clubs. Competitors from Russia and Australia also confirmed their intentions to travel to Paris.

On 9 November 1898, the Union des Sociétés Françaises de Sports Athlétiques ("Union of the French Societies for Athletic Sports" or USFSA) put out an announcement that it would have sole right to any organised sport held during the World's Fair. It was an empty threat but Viscount Charles de La Rochefoucauld, the nominated head of the organizing committee, stepped down rather than be embroiled in the political battle. The Baron de Coubertin, who was also secretary-general of the USFSA, was urged to withdraw from active involvement in the running of the Games and did so, only to comment later, "I surrendered – and was incorrect in doing so."

The IOC ceded control of the Games to a new committee which was to oversee every sporting activity connected to the 1900 Exposition Universelle. Alfred Picard appointed Daniel Mérillon, the head of the French Shooting Association, as president of this organization in February 1899. Mérillon proceeded to publish an entirely different schedule of events, with the result that many of those that had made plans to compete in concordance with the original program withdrew, and refused to deal with the new committee.