East Timor (Timor-Leste) competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August. The nation's appearance at the 2004 Athens Games marked its official debut in any Olympic event and also the Summer Olympics.
Costa Rica 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, since its debut in 1936.
Lesotho 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, except the 1976 Summer Olympics in Montreal, because of its partial support to the African boycott.
Namibia 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.
Rwanda 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.
Belize competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. It was the nation's twelfth appearance at the Olympic Games, although it had previously appeared in two early editions under the name "British Honduras". Belize joined the United States-led boycott of the 1980 Summer Olympics hosted in Moscow, Russia. The delegation included two track and field athletes: Brandon Jones and Katy Sealy, as well as judoka Renick James. All three athletes made their Olympic debut. Belize Olympic and Commonwealth Games Association appointed 200 metres sprinter Brandon Jones to carry the nation's flag in the opening ceremony. Belize, however, has yet to win its first Olympic medal.
Guam competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from August 5 to 21, 2016. This was the territory's eighth consecutive appearance at the Summer Olympics.
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-Bissau competed at the 2016 Summer Olympics in Rio de Janeiro, from August 5 to 21, 2016. It was the nation's sixth consecutive appearance at the Summer Olympics.
San Marino competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation's official debut in 1960, Sammarinese athletes have appeared in every edition of the Summer Olympic Games, except for a single occasion. San Marino failed to register any athletes at the 1964 Summer Olympics in Tokyo.
São Tomé and Príncipe competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The country's participation at Rio de Janeiro marked its sixth consecutive appearance at the Summer Olympics. Three athletes from São Tomé and Princípe were selected for the Games. Romário Leitão and Celma Bonfim da Graça participated in athletics and Buly Triste in flatwater canoeing. Bonfim was the only female on the roster and the only member with prior Olympic experience. Triste was the first male athlete to carry the São Tomé and Princípe flag at the opening ceremony. São Tomé and Princípe has yet to win its first Olympic medal.
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.
Sierra Leone 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, except for two occasions. Sierra Leone failed to register any athletes at the 1972 Summer Olympics in Munich, and also joined the rest of the African nations to boycott the 1976 Summer Olympics in Montreal.
Togo 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.
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.
Laos, officially the Lao People's Democratic Republic, 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 attended all games since 1980 with the exception of the 1984 Summer Olympics in Los Angeles, because of the Soviet boycott.
American Samoa 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.
Tuvalu competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The country's participation at Rio de Janeiro marked its third consecutive appearance at the Summer Olympics since its debut in 2008. The delegation included a single track and field athlete: sprinter Etimoni Timuani. Etimoni was also the nation's flagbearer in the Parade of Nations. He did not progress past the first round of his men's 100 metres competition.
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.
Individual Olympic Athletes (2000)
