Republic of Cyprus competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's ninth consecutive appearance at the Olympics.
Poland competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's twentieth appearance at the Summer Olympics, having missed the 1984 Summer Olympics in Los Angeles because of the Soviet boycott. The Polish Olympic Committee sent a total of 218 athletes to the Games, 130 men and 88 women, to compete in 22 sports.
Austria competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. The nation has competed at every edition of Summer Olympic Games, except the 1920 Summer Olympics in Antwerp. The Österreichisches Olympisches Comité sent a total of 70 athletes to the Games, 39 men and 31 women, to compete in 17 sports. This was approximately the same size as the previous Games, with the difference of one male athlete, the addition of one female athlete and three sporting events participated in. There was only a single competitor in eventing, fencing, rhythmic gymnastics, modern pentathlon, and Greco-Roman wrestling.
Paraguay competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. 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.
Cuba competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's nineteenth appearance in the Olympics. With baseball's removal from the Olympic program and the absence of the nation's volleyball team for the first time, the Cuban Olympic Committee sent the nation's smallest delegation to the Games since 1964. A total of 111 athletes, 66 men and 45 women, competed in 13 sports. There was only a single competitor in archery and table tennis.
Jamaica competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was Jamaica's most successful performance in the Summer Olympics; it was approximately the same size from the previous games with a delegation of 50 athletes, and its athletes broke the nation's record for the number of medals, won in a single games. Jamaica's participation in London marked its sixteenth appearance as an independent nation, although it had previously competed in four other games as a British colony, and as part of the West Indies Federation. Usain Bolt became the nation's greatest highlight of these games, having won three of Jamaica's four gold medals at London, and breaking an Olympic and world record in two of the three events in which he participated. Because of his repeated successes for the most medals and records, Bolt became Jamaica's first male flag bearer at the opening ceremony since 1984.
Zimbabwe competed at the 2012 Summer Olympics in London, UK from 27 July to 12 August 2012. This was the nation's ninth consecutive appearance at the Olympics, after gaining its independence from the former Rhodesia.
The Bahamas competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. The Bahamas Olympic Association sent a total of 24 athletes to these Games, 14 men and 10 women, to compete only in athletics and swimming. The nation's participation at the Olympic games marked its sixteenth appearance as an independent nation.
Panama competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's sixteenth appearance at the Olympics since its debut in 1920. Panama did not compete on four occasions, including the 1980 Summer Olympics in Moscow, because of its partial support of the United States boycott.
Sudan competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's eleventh appearance at the Olympics, since its debut in 1960. Sudan, however, did not attend the 1976 Summer Olympics in Montreal and the 1980 Summer Olympics in Moscow because of the African and the United States boycott.
Kenya competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's thirteenth appearance at the Olympics, they did not participate in the 1976 Summer Olympics in Montreal and the 1980 Summer Olympics in Moscow because of the African and United States boycott.
Kuwait competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's twelfth consecutive appearance at the Olympics.
Puerto Rico competed at the 2012 Summer Olympics in London, United Kingdom from July 27 to August 12, 2012. This was the nation's seventeenth consecutive appearance at the Olympics.
Barbados competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This nation marked its eleventh appearance at the Olympic games.
Burundi competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's fifth appearance at the Olympics.
Botswana competed at the 2016 Summer Olympics in Rio de Janeiro, from 5 to 21 August 2016. This was the nation's tenth consecutive appearance at the Summer Olympics.
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.
Bosnia and Herzegovina competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's seventh consecutive appearance at the Summer Olympics.
Comoros competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's sixth consecutive appearance at the Summer Olympics.
Bosnia and Herzegovina 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 eighth consecutive appearance at the Summer Olympics.
Yugoslavia (1920–1992 W)
