Greece competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Greek athletes have competed in every Summer Olympic Games of the modern era, alongside Australia, France, Great Britain, and Switzerland. As the progenitor nation of the Olympic Games and in keeping with tradition, Greece entered first at the Maracanã Stadium during the opening ceremony.
Angola 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, with the exception of the 1984 Summer Olympics in Los Angeles, because of its participation in the Soviet boycott.
The Bahamas, officially the Commonwealth of The Bahamas, competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The nation's participation at these Games marked its seventeenth appearance as an independent nation.
Peru competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation's official debut in 1936, Peruvian athletes have appeared in every edition of the Summer Olympic Games throughout the modern era. Peru failed to register any athletes at the 1952 Summer Olympics in Helsinki.
Burundi 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.
Indonesia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's fifteenth appearance at the Summer Olympics.
Cayman Islands competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's tenth appearance at the Summer Olympics.
Uruguay competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil from 5 to 21 August 2016. Since the nation's official debut in 1920, Uruguayan athletes have appeared in every edition of the Summer Olympic Games, with the exception of the 1980 Summer Olympics in Moscow, because of its partial support to the United States-led boycott.
Congo, officially Republic of the Congo, competed at the 2016 Summer Olympics in Rio de Janeiro, from August 5 to 21, 2016. This was the nation's twelfth appearance at the Summer Olympics, since its debut in 1964. Congolese athletes did not attend the 1968 Summer Olympics in Mexico City, and the 1976 Summer Olympics in Montreal because of the African boycott.
Niger competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation made its debut in 1964, Nigerien athletes had participated in every edition of the Summer Olympic Games, except for two rare occasions, the 1976 Summer Olympics in Montreal, and the 1980 Summer Olympics in Moscow because of the African and the US-led boycotts, respectively.
Mali competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation made its debut in 1964, Malian athletes had appeared in every edition of the Summer Olympic Games, with the exception of the 1976 Summer Olympics in Montreal because of the African boycott.
Burkina Faso competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's ninth appearance at the Summer Olympics, having participated since the 1972 Summer Olympics in Munich under the name Upper Volta.
Sudan competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's eleventh appearance at the Summer Olympics.
Guinea competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's eleventh appearance at the Summer Olympics since its debut in 1968. Guinea failed to register any athletes at the 1972 Summer Olympics in Munich, and eventually joined the rest of the African nations to boycott the 1976 Summer Olympics in Montreal.
Malawi competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's tenth appearance at the Summer Olympics. Malawi did not attend the 1976 Summer Olympics in Montreal and the 1980 Summer Olympics in Moscow, because of its support to the African and United States-led boycott.
Palau competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's fifth consecutive appearance at the Summer Olympics.
Yemen 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, since its reunification in 1990.
Andorra competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's eleventh consecutive appearance at the Summer Olympics.
The Maldives competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's eighth consecutive appearance at the Summer Olympics. The delegation included two track and field athletes: Hassan Saaid and Afa Ismail, as well as swimmers Ibrahim Nishwan and Aminath Shajan. Both Shajan and Ismail were returning competitors from the 2012 London Olympics, with the former leading the Maldivian squad as the flag bearer in the opening ceremony. The Maldives, however, has yet to win its first ever Olympic medal.
The Federated States of Micronesia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's fifth consecutive appearance at the Summer Olympics.
