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.
Turkey competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Turkish athletes have competed at every Summer Olympic Games since its debut in 1908. Turkey did not attend the 1920 Summer Olympics in Antwerp, the 1932 Summer Olympics in Los Angeles at the period of worldwide Great Depression, and the 1980 Summer Olympics in Moscow because of its support for the United States boycott. The Turkish Olympic Committee sent the nation's largest delegation to the Games. A total of 65 athletes, 45 men and 20 women, competed in 10 sports. There was only a single competitor in shooting and taekwondo.
Chinese Taipei competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. "Chinese Taipei" was the designated name used by Taiwan to participate in some international organizations and almost all sporting events, including the Olympic Games. Neither the common name "Taiwan" nor the official name "Republic of China" would be used primarily due to opposition from the People's Republic of China. This also was the nation's eighth consecutive appearance at the Olympics.
China competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's ninth appearance at the Summer Olympics since its debut in 1952. A total of 384 Chinese athletes, 136 men and 248 women, were selected by the Chinese Olympic Committee to compete in 28 sports. For the third time in its Olympic history, China was represented by more female than male athletes.
Colombia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixteenth appearance at the Olympics, except the 1952 Summer Olympics in Helsinki.
Tunisia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eleventh appearance at the Olympics, except the 1980 Summer Olympics in Moscow because of its partial support to the United States boycott.
Palau competed in the Olympic Games for the first time at the 2000 Summer Olympics in Sydney, Australia.
Nigeria competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's fifteenth appearance at the Olympics. Nigeria missed the 1976 Summer Olympics in Montreal because of the African boycott. The Nigerian Olympic Committee sent the nation's smallest delegation to the Games since 1984. A total of 53 athletes, 30 men and 23 women, competed in 8 sports. Men's basketball was the only team-based sport in which Nigeria was represented at these Olympic Games. Among the eight sports played by the athletes, Nigeria marked its official Olympic debut in slalom canoeing.
Samoa competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's eighth appearance at the Olympics, although four other games were first appeared under the name Western Samoa.
Finland competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Finnish athletes have appeared in every edition of the Summer Olympic Games since the nation's official debut in 1908.
Samoa competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's ninth consecutive appearance at the Summer Olympic Games, although it had previously competed in four editions under the name Western Samoa.
The Solomon Islands competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's ninth consecutive appearance at the Summer Olympics. The delegation included two track and field athletes – Rosefelo Siosi and Sharon Firisua – as well as weightlifter Jenly Tegu Wini. Wini was a returning competitor from the 2012 London Olympics and also led the delegation in those Games. The Solomon Islands, however, has yet to win its first Olympic medal.
Fiji competed at the 2018 Commonwealth Games in the Gold Coast, Australia from April 4 to April 15, 2018. It was Fiji's 16th appearance at the Commonwealth Games.
Australia 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. Australia is one of only five countries to have sent athletes to every Summer Olympics of the modern era, alongside Great Britain, France, Greece, and Switzerland.
Australia is scheduled to compete at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Australian athletes have appeared in every Summer Olympic Games of the modern era, alongside France, Great Britain, Greece, and Switzerland. As Brisbane will stage the 2032 Summer Olympics, Australia and the United States, the next nation to host the 2028 Summer Olympics in Los Angeles, will march before the homebound French team enters Place du Trocadéro during the parade of nations segment of the opening ceremony.
Papua New Guinea competed at the 2023 Pacific Games in Honiara, Solomon Islands from 19 November to 2 December 2023. Papua New Guinean athletes have appeared in every edition of the Pacific Games since the inaugural games in 1963.
American Samoa competed at the 2023 Pacific Games in Honiara, Solomon Islands from 19 November to 2 December 2023.
New Zealand competed at the 2023 Pacific Games in Honiara, Solomon Islands from 19 November to 2 December 2023. This is New Zealand's third appearance at the games since first appearing in 2015.
Palau competed at the 2023 Pacific Games in Honiara from 19 November to 2 December 2023. This was Palau's seventh appearance at the Pacific Games since first competing in 1999.
Guam competed at the 2023 Pacific Games in Honiara from 19 November to 2 December 2023. These games were Guam's sixteenth appearance since first participating in the second edition in 1966.
