Australia has sent athletes to all editions of the modern Olympic Games. Australia has competed in every Summer Olympic Games, as well as every Winter Olympics except 1924–32 and 1948. In 1908 and 1912 Australia competed with New Zealand under the name Australasia.
France was the host of the 1900 Summer Olympics in Paris. France was one of many nations that had competed in the 1896 Summer Olympics in Greece and had returned to compete at the 1900 Games.
The United States of America has sent athletes to every celebration of the modern Summer Olympic Games with the exception of the 1980 Summer Olympics, during which it led a boycott against the host Soviet Union due to the Soviet–Afghan War. The United States Olympic & Paralympic Committee (USOPC) is the National Olympic Committee for the United States.
Hungary first participated at the Olympic Games at the inaugural 1896 Games, and has sent athletes to compete in most Summer Olympic Games and every Winter Olympic Games since then. The nation was not invited to the 1920 Games for its role in World War I, and was part of the Soviet-led boycott of the 1984 Summer Olympics.
The United Kingdom has been represented at every modern Olympic Games, and as of the 2020 Summer Olympics is third in the all-time Summer Olympic medal table by both number of gold medals won and overall number of medals. London has hosted the Summer Olympic Games three times: in 1908, 1948, and 2012.
Italy has sent athletes to most of the modern Olympic Games held since 1896, outside of not having "officially" participated in the 1904 Summer Olympics.
Greece has a long presence at the Olympic Games, as they have competed at every Summer Olympic Games, one of only five countries to have done so, and most of the Winter Olympic Games. Greece has hosted the Games twice, both in Athens. As the home of the Ancient Olympic Games it was a natural choice as host nation for the revival of the modern Olympic Games in 1896, while Greece has also hosted the 2004 Summer Olympics. During the parade of nations at the opening ceremony of the Olympic Games, Greece always enters the stadium first and leads the parade to honor its status as the birthplace of the Olympics, with the notable exception of 2004 when Greece entered last as the host nation. Before the Games the Olympic Flame is lit in Olympia, the site of the Ancient Olympic Games, in a ceremony that reflects ancient Greek rituals and initiates the Olympic torch relay. The flag of Greece is always hoisted in the closing ceremony, along with the flags of the current and the next host country.
The modern Olympic Games were founded by French historian Pierre de Coubertin. France has competed in every edition, with the possible exception of the 1904 Games.
Denmark first participated at the Olympic Games at the inaugural 1896 Games, and has sent athletes to compete in every Summer Olympic Games since then, except for the sparsely attended 1904 Games. Denmark has also participated in the Winter Olympic Games several times since 1948, including every Games since 1988.
Canada has competed at 23 Summer Olympic Games, missing only the inaugural 1896 Summer Olympics and the boycotted 1980 Summer Olympics. The nation made its debut at the 1900 Summer Olympics. Canada competes under the IOC country code CAN.
France competed at the 1912 Summer Olympics in Stockholm, Sweden. 119 competitors, 118 men and 1 woman, took part in 66 events in 13 sports.
Great Britain, represented by the British Olympic Association (BOA), competed at the 1912 Summer Olympics in Stockholm, Sweden. 274 competitors, 264 men and 10 women, took part in 79 events in 16 sports. British athletes won ten gold medals and 41 medals overall, finishing third.
Great Britain, represented by the British Olympic Association (BOA), competed at the 1920 Summer Olympics in Antwerp, Belgium. 234 competitors, 218 men and 16 women, took part in 84 events in 21 sports. British athletes won fourteen gold medals and 43 medals overall, finishing third. It would be the last Olympic Games in which Irish athletes participated under Great Britain, after foundation of Irish Free State in 1922.
The United States competed at the 1912 Summer Olympics in Stockholm, Sweden. 174 competitors, took part in 68 events in 11 sports. Out of the 174 athletes who had participated, 63 won medals.
Austria competed at the 1912 Summer Olympics in Stockholm, Sweden. Austrian and Hungarian results at early Olympic Games are generally kept separate despite the union of the two nations as Austria-Hungary at the time. 85 competitors, 76 men and 6 women, took part in 46 events in 12 sports.
Italy competed at the 1920 Summer Olympics in Antwerp, Belgium. 174 competitors, 173 men and 1 woman, took part in 79 events in 18 sports.
Hungary competed at the 1912 Summer Olympics in Stockholm, Sweden. Austrian and Hungarian results at early Olympic Games are generally kept separate despite the union of the two nations as Austria-Hungary at the time. 121 competitors, all men, took part in 52 events in 11 sports.
Belgium was the host nation for the 1920 Summer Olympics in Antwerp. 336 competitors, 326 men and 10 women, took part in 121 events in 23 sports.
Germany competed at the 1912 Summer Olympics in Stockholm, Sweden. 185 competitors, 180 men and 5 women, took part in 69 events in 14 sports. Due to the political fallout from World War I, this was the country's last appearance until 1928.
Australia has participated officially in every Paralympic Games since its inauguration in 1960 except for the 1976 Winter Paralympics.
