Great Britain, the team of the British Olympic Association (BOA), competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004 with the team of selected athletes was officially known as Team GB. The British sent a wide-ranging delegation to the Games, continuing its ubiquitous presence at the Olympics. Great Britain's 264 athletes, 161 men and 103 women, competed in 22 disciplines throughout the two-week event. The team entered the opening ceremony behind the Union Flag carried by judoka Kate Howey. Double gold medal winner Kelly Holmes carried the flag at the closing ceremony.
Sweden competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This nation has competed at every Summer Olympic Games in the modern era, except for the 1904 Summer Olympics in St. Louis. The Swedish Olympic Committee sent the nation's smallest team to the Games since the 1976 Summer Olympics in Montreal. A total of 115 athletes, 62 men and 53 women, competed only in 20 different sports. Women's football was the only team-based sport in which Sweden had its representation at these Games. There was only a single competitor in boxing, diving, artistic gymnastics, judo, modern pentathlon, and rowing.
Slovakia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's third consecutive appearance at the Summer Olympics since the post-Czechoslovak era. The Slovak Olympic Committee sent a total of 64 athletes to the Games, 48 men and 16 women, to compete in 11 sports. There was only a single competitor in artistic and trampoline gymnastics and sailing.
Serbia and Montenegro competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Previously known as the Federal Republic of Yugoslavia, this was the nation's third and last joint appearance at the Summer Olympics before Serbia and Montenegro became separated independent states in 2006. The Olympic Committee of Serbia and Montenegro sent a total of 85 athletes to the Games, 78 men and 7 women, to compete in 14 sports. Men's basketball, football, volleyball, and water polo were the only team-based sports in which Serbia and Montenegro had its representation at these Games. There was only a single competitor in road cycling, judo, tennis, and wrestling.
Norway was represented at the 1972 Summer Olympics in Munich by the Norwegian Olympic Committee and Confederation of Sports. 112 competitors, 101 men and 11 women, took part in 70 events in 15 sports.
The Republic of China (Taiwan) competed at the 1972 Summer Olympics in Munich for the last time as the "Republic of China". The ROC would not return to the Olympics until 1984 and under the name "Chinese Taipei" due to objections by the People's Republic of China over the political status of Taiwan.
Switzerland competed at the 1972 Summer Olympics in Munich, West Germany. 151 competitors, 122 men and 29 women, took part in 116 events in 17 sports.
Athletes from the Socialist Federal Republic of Yugoslavia competed at the 1980 Summer Olympics in Moscow, USSR. 164 competitors, 135 men and 28 women, took part in 69 events in 17 sports.
Czechoslovakia competed at the 1972 Summer Olympics in Munich, West Germany. 181 competitors, 145 men and 36 women, took part in 93 events in 17 sports.
Romania competed at the 1972 Summer Olympics in Munich, West Germany. 159 competitors, 132 men and 27 women, took part in 102 events in 16 sports.
Kyrgyzstan competed in the Summer Olympic Games as an independent nation for the first time at the 1996 Summer Olympics in Atlanta, United States. Previously, Kyrgyz athletes had competed for the Unified Team at the 1992 Summer Olympics.
Athletes from the Federal Republic of Yugoslavia competed at the 1996 Summer Olympics in Atlanta, United States. These Games were the first Olympic appearance of Montenegrin and Serbian athletes under the Flag of the Federal Republic of Yugoslavia and the continuation of the use of Yugoslavia as a designation. The nation was not allowed to participate at the 1992 Summer Olympics because of international sanctions. Several Yugoslav athletes competed as Independent Olympic Participants at those Games. New Yugoslavia participated in thirteen sports: athletics, basketball, canoe/kayak, diving, fencing, judo, shooting, swimming, table tennis, volleyball, water polo, weightlifting, and wrestling.
Zimbabwe competed at the 1984 Summer Olympics in Los Angeles, United States. This was the fifth time that Zimbabwe had competed at an Olympic Games with the first three as Rhodesia. 15 competitors, 12 men and 3 women, took part in 18 events in 5 sports.
Yugoslavia competed at the 1984 Summer Olympics in Los Angeles, United States which took place from 29 July to 12 August 1984. Yugoslav athletes had competed in every Summer Olympic Games since their official debut in 1920. The Yugoslav Olympic Committee (JOK) sent a delegation of 139 athletes, 105 men and 34 women, competing in 16 sports, down from 164 competitors in 1980. Due to the Soviet-led boycott, Yugoslavia was one of only three Communist countries to take part at the Games, along with China and Romania.
Athletes from the Socialist Federal Republic of Yugoslavia competed at the 1988 Summer Olympics in Seoul, South Korea. This was the last time that the SFR Yugoslavia competed in the Summer Olympics. 155 competitors, 117 men and 38 women, took part in 72 events in 18 sports.
Serbia competed at the 2008 Summer Olympics in Beijing, People's Republic of China. The country returned under the name Serbia after 96 years, previously competing under the names Yugoslavia (1920–1988), Independent Olympic Participants (1992), Yugoslavia (1996–2002) and Serbia and Montenegro (2004–2006).
Ukraine competed in the 2008 Summer Olympics. The country repeated its 2004 performance in terms of total medals, but its gold medal haul fell slightly from 8 to 7.
Sri Lanka participated at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012. The country's participation at London marked its sixteenth appearance in the Summer Olympics since its debut at the 1948 Summer Olympics, having missed only the 1976 Games. The delegation consisted of seven competitors: two athletics competitors, two badminton players one shooter and two short-distance swimmers. Cooray, Samarakoon and Karunaratne qualified for the Games by meeting their respective qualifying standards; the remainder of the team entered through wildcard or quota places. Karunarante was the flag bearer for the opening and closing ceremonies.
Serbia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. It was the nation's fourth appearance at the Summer Olympics as an independent country. The Olympic Committee of Serbia confirmed a roster of 103 athletes, 58 men and 45 women, to compete across 14 sports at the Games.
Oman competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, when the event was held from 5 to 21 August 2016. This was the nation's ninth consecutive appearance at the Summer Olympics. Four Omani athletes, two men and two women, were selected to compete in athletics and shooting at the Games. Among them were sprinter Barakat Al-Harthi, the lone returning Olympian from the previous Games.
Yugoslavia (1920–1992 W)
North Macedonia (1996–)
Serbia and Montenegro (1996–2006)
Serbia (1912, 2008–)
Montenegro (2008–)
Kosovo (2016–)
