Indonesia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's twelfth appearance at the Olympics, excluding the 1964 Summer Olympics in Tokyo, and the 1980 Summer Olympics in Moscow because of the United States boycott. Krisna Bayu was originally the flag bearer, however the role was later done by Christian Hadinata because Bayu was suffering from flu at the eve of opening ceremony.
Belgium competed at the 2004 Summer Olympics in Athens, Greece. 50 competitors, 31 men and 19 women, took part in 41 events in 14 sports.
Switzerland competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Swiss athletes competed at every Summer Olympic Games in the modern era, except when they boycotted the 1956 Summer Olympics in Melbourne as a protest to the Soviet invasion of Hungary. The Swiss Olympic Association sent a total of 98 athletes to the Games, 59 men and 39 women, to compete in 18 sports.
Vietnam competed at the 2004 Summer Olympics in Athens, Greece from 13 to 29 August 2004.
The Czech Republic competed at the 1996 Summer Olympics in Atlanta, United States. It was the first Summer Games since the dissolution of Czechoslovakia, and so the Czech Republic and Slovakia competed as independent teams. 115 competitors, 76 men and 39 women, took part in 110 events in 17 sports.
Algeria competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China, from 8 to 24 August 2008.
Uganda competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation's official debut in 1956, Ugandan athletes have appeared in every edition of the Summer Olympic Games, with the exception of the 1976 Summer Olympics in Montreal because of its partial support of the African boycott.
Uganda 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. Since the nation's official debut in 1956, Ugandan athletes have appeared in every edition of the Summer Olympic Games, with the exception of the 1976 Summer Olympics in Montreal because of its partial support of the African boycott.
Vietnam competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's eleventh appearance at the Olympics as a reunified republic, although the Vietnamese athletes previously attended six other editions under the banner of the State of Vietnam or South Vietnam, except on two occasions: in 1976, as the result of an impact areas in the nation's warzones during the Vietnam War, and in 1984 due to the nation's support for the Soviet-led boycott. It was the second consecutive time Vietnam had failed to win any medals since the 2016 Summer Olympics. Like in 2020, Vietnam finished the Summer Olympics without a single medal earned.
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.
Peru competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Since the nation's official debut in 1936, Peruvian athletes have appeared in every edition of the Summer Olympic Games, except for Helsinki 1952.
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.
Norway competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Norwegian athletes have appeared in every edition of the Summer Olympic Games, except for the 1980 Summer Olympics in Moscow because of the country's support for the United States-led boycott.
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.
Singapore competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's eighteenth appearance at the Summer Olympics since its debut at the 1948 Games. Singapore has competed in every edition since except 1964 in Tokyo, as part of the Malaysian team, and 1980 in Moscow, because of its support for the United States boycott.
Zimbabwe competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's eleventh consecutive appearance at the Summer Olympics as an independent nation under the name Zimbabwe, after appearing as Southern Rhodesia and Rhodesia in the colonial era, except for 1932, 1936, 1948, 1952, 1956, 1968, due to the Mexican government's interpretation of regulations on passports, 1972, as well as the nation's withdrawal, 1976, as the nation joined the African boycott, and the nation's independence in 1979, and it has been participated in every Olympics since 1980.
Kuwait competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It was the nation's fourteenth appearance at the Summer Olympics, although it competed under the Independent Olympic Athletes at the previous Games in 2016, resulting from the country's suspension by the International Olympic Committee for government interference.
Bermuda competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Since the nation's official debut in 1936, Bermudian athletes have appeared in every edition of the Summer Olympic Games, but did not attend the 1980 Summer Olympics in Moscow because of the nation's support for the US-led boycott.
Togo competed at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. Since the nation made its debut in 1972, Togolese athletes participated in every edition of the Summer Olympic Games, except for two occasions, the 1976 Summer Olympics in Montreal, and the 1980 Summer Olympics in Moscow because of the African and the US-led boycotts, respectively.
Nicaragua competed at the 2024 Summer Olympics in Paris, France from 26 July to 11 August 2024. It was the nation's fifteenth appearance at the Summer Olympics, having competed at every Games since 1968 with the exception of the 1988 Summer Olympics in Seoul because of its partial support of the North Korean boycott.
