The modern pentathlon is an Olympic multisport that currently consists of fencing, freestyle swimming, equestrian show jumping, laser pistol shooting, and cross country running. Equestrian will be replaced by a form of obstacle course racing at the 2028 Summer Olympics.
France competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. French athletes have competed in every Summer Olympic Games of the modern era. The French Olympic Committee sent a total of 308 athletes to the Games, 195 men and 113 women, to compete in 25 sports.
Kazakhstan competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's third appearance at the Summer Olympics in the post-Soviet era.
Czech Republic competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's third appearance at the Summer Olympics after gaining its independence from the former Czechoslovakia. The Czech Olympic Committee sent the nation's largest team to the Games since the post-Czechoslovak era. A total of 142 athletes, 80 men and 62 women, competed in 19 sports; the nation's team size was roughly denser from Sydney by one sixth of the athletes. Women's basketball was the only team-based sport in which the Czech Republic had its representation at these Olympic Games. There was only a single competitor in equestrian, artistic and trampoline gymnastics, judo, and weightlifting.
Hungary competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Hungarian athletes have competed at every Summer Olympic Games in the modern era, except the 1920 Summer Olympics in Antwerp, and the 1984 Summer Olympics in Los Angeles because of the Soviet boycott. The Hungarian Olympic Committee sent a total of 209 athletes to the Games, 119 men and 90 women, to compete in 20 sports. Water polo and handball were the only team-based sports in which Hungary had its representation in these Olympic Games. There was only a single competitor in road cycling and mountain biking.
Chile competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This nation has competed at every Olympic Games, except the 1932 Summer Olympics in Los Angeles, and the 1980 Summer Olympics in Moscow because of the United States boycott.
Bulgaria competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Bulgaria made their official debut at the 1896 Summer Olympics in Athens. Bulgarian athletes had appeared in every edition of the Summer Olympics since 1924, except for three occasions: the 1948 Summer Olympics in London, and the 1932 and 1984 Summer Olympics in Los Angeles because of Bulgaria's actions in World War II, the worldwide Great Depression and the Soviet boycott, respectively.
Uzbekistan competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, due to the COVID-19 pandemic. It was the nation's seventh consecutive appearance at the Summer Olympics in the post-Soviet era.
Kazakhstan competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. It was the nation's seventh consecutive appearance at the Summer Olympics in the post-Soviet era.
Poland competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024, celebrating the centenary of the team's debut in the same venue. Polish athletes have appeared in every edition of the Summer Olympic Games from 1924 onwards, except for the 1984 Summer Olympics because of the Soviet boycott.
Germany participated at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's eighteenth consecutive appearance at the Summer Olympic Games, except for 1920 and 1924 due to the nation's role in World War I, and 1948 for the nation's role in World War II. From 1956 through 1964, Germans competed as part of the United Team of Germany (UTG); in 1968, the team was split into two teams West Germany and East Germany. West Germany boycotted the 1980 games as part of the American-led boycott, and then returned in 1984. East Germany boycotted the 1984 games as part of the Soviet-led boycott, and in 1988, East Germany returned for the last time. One year after the fall of the Berlin Wall, West and East Germany re-united as one country with their reunification in 1990, and it has participated in every Summer Olympics since 1992 games in Barcelona.
Cuba competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's twenty-second appearance at the Summer Olympics. The 2024 Cuban delegation was smaller than their 2020 delegation, which was previously their smallest delegation since 1964. It was also the second time since 1964 that the Cuban delegation had fewer than one hundred athletes.
The Czech Republic, officially named Czechia by the IOC, competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Czech athletes have appeared in every edition of the Summer Olympic Games, except for three occasions: Athens 1896, St. Louis 1904 and Los Angeles 1984 as part of the Soviet boycott. It is the nation's eighth consecutive appearance at the Summer Olympics after splitting from the former Czechoslovakia.
Switzerland competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Swiss athletes have appeared in every Summer Olympic Games edition of the modern era, except for a partial boycott of Melbourne 1956 in protest of the Soviet invasion of Hungary.
Italy competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Italian athletes have appeared in every Summer Olympics edition of the modern era, with the disputed exception of the 1904 edition in which one Italian may have competed.
Mexico competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's twenty-fifth appearance at the Summer Olympics.
Ukraine competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's eighth consecutive appearance at the Summer Olympics in the post-Soviet era and the first since the Russian invasion of Ukraine. A total of 140 athletes competed amid the Russian invasion, the lowest number in the history of Ukraine's participation in the games.
Egypt competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Since the nation's debut in 1912, Egyptian athletes have appeared in every edition of the Summer Olympic Games except for two occasions: the 1932 Summer Olympics in Los Angeles because of the worldwide Great Depression and the 1980 Summer Olympics in Moscow, as part of the United States-led boycott.
The People's Republic of China competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's twelfth appearance at the Summer Olympics since its debut in 1952. However, China did not participate in the next seven games: 1956; the nation was absent in 1960 and 1964 over a dispute with Taiwan; 1968; 1972 due to issues with GANEFO; 1976 due to Republic of China boycott; and 1980, joining the US led boycott. The nation has participated in every Olympics since the 1984 Summer Olympics.
Uzbekistan competed at the 2024 Summer Olympics in Paris, which took place from 26 July 2024 to 11 August 2024. It was the nation's eighth consecutive appearance at the Summer Olympics in the post-Soviet era.
