The British Virgin Islands competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixth appearance at the Summer Olympics since its debut in the 1984 Summer Olympics. The British Virgin Islands delegation included only one athlete, meaning the country, along with Brunei and Liechtenstein, sent the lowest number of athletes to the 2004 Summer Games. The athlete selected was sprinter Dion Crabbe, an athlete who qualified for the Olympics by meeting the "A" standard time required for his event, the men's 200 meters. Crabbe was also selected as flag bearer for the opening ceremony. He did not progress beyond the heats, meaning the British Virgin Islands won no medals at this Summer Olympics.
São Tomé and Príncipe competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August 2004. The country's participation at Athens marked its third appearance in the Summer Olympics since its debut in the 1996 Summer Olympics.
Sierra Leone competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eighth appearance at the Summer Olympics since its debut in the 1968 Summer Olympics. The Sierra Leone delegation included two track and field athletes; Lamin Tucker and Hawanatu Bangura, both of whom were sprinters that were selected via winning an event in Freetown, as the nation had no athletes that met the "A" or "B" standards in any event. Bangura was selected as flag bearer for the opening ceremony. Neither of the two athletes progressed beyond the heats.
Chad competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its tenth appearance in the Summer Olympics since its debut at the 1964 Summer Games in Tokyo, Japan. The delegation included two track and field athletes; Djikoloum Mobele in the men's 100 metres and Kaltouma Nadjina in the women's 400 metres. Both athletes participated at the Games through wild card places since they did not meet the required standards to qualify. Nadjina progressed past the first round of her competition, but was eliminated in the semi-finals.
Brunei, as Brunei Darussalam, competed at the 2004 Summer Olympics in Athens, Greece, which took place between 13 and 29 August 2004. The country's participation in Athens marked its fourth appearance at the Summer Olympics since its debut in the 1988 Summer Olympics.
Vanuatu competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August 2004. The nation's appearance at the 2004 Athens Games marked its fifth appearance at the Summer Olympics since its debut at the 1988 Summer Olympics.
Togo competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its seventh appearance in the Summer Olympics since its debut at the 1972 Summer Games in Munich, West Germany. The delegation included two track and field athletes and a single canoeist; Jan Sekpona in the men's 800 metres, Sandrine Thiébaud-Kangni in the women's 400 metres, and Benjamin Boukpeti in the men's K-1. Both Sekpona and Thiébaud-Kangni were eliminated in the first round of their competitions, while Boukpeti progressed to the semi-finals.
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.
Kiribati competed in the Summer Olympic Games for the second time at the 2008 Summer Olympics in Beijing, China, following their debut appearance in the 2004 Summer Olympics in Athens, Greece. The country had intended to send a total of three athletes to the Games, competing in two sports: athletics and weightlifting. Female sprinter Kaitinano Mwemweata had to withdraw due to illness after contracting tuberculosis.
East Timor (Timor-Leste) competed at the 2008 Summer Olympics in Beijing, China which was held from 8 to 24 August. The country's participation at Beijing marked its second appearance in the Summer Olympics since its debut in the 2004 Summer Olympics. The delegation included Augusto Ramos Soares and Mariana Diaz Ximenez, both of whom were marathoners that qualified via wildcard places as the nation had no athletes that met the "A" or "B" qualifying standards. Ximenez was selected as flag bearer for the opening ceremony. Neither of the two athletes finished their events; Soares did not even start.
Benin took part in the 2008 Summer Olympics which were held in Beijing, China from 8 to 24 August 2008. The country's participation at Beijing marked its eighth consecutive appearance in the summer Olympics since its debut in 1972, and its ninth Olympic appearance ever. The Benin delegation included five athletes in 2008, participating in three sports: athletics, swimming and taekwondo. Fabienne Feraez, a sprinter, was selected as the flag bearer for the opening ceremony. None of the Benin athletes progressed further than the heat round.
Mauritania competed at the 2008 Summer Olympics which was held in Beijing, China. The country's participation at Beijing marked its seventh appearance in the Summer Olympics since its debut in the 1984 Summer Olympics. The delegation included two track and field athletes, Souleymane Ould Chebal and Bounkou Camara, who were both selected by wildcards after both failed to meet either the "A" or "B" qualifying standards. Chebal was selected as the flag bearer for the opening ceremony. Neither of the Mauritanians progressed beyond the heats.
Comoros competed at the 2012 Summer Olympics in London, England, which was held from 27 July to 12 August 2012. The country's participation at London marked its fifth appearance in the Summer Olympics since its début at the 1996 Summer Olympics. The delegation included two track and field athletes: Maoulida Darouèche and Feta Ahamada, and one swimmer, Ayouba Ali Sihame, all three qualified for the Games through wildcard places. Ahamada was selected as the flag bearer for the opening ceremony and Darouèche held it at the closing ceremony. Ahamada won her heat in the preliminary round of the women's 100 metres but was eliminated in the heat stages, while Darouèche and Sihame did not advance beyond the first round of their respective events.
Equatorial Guinea competed 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 eighth appearance in the Summer Olympics since its début at the 1984 Summer Olympics. The delegation included two track and field athletes, Benjamín Enzema and Bibiana Olama who both qualified for the Games via wildcard places because their fastest times did not meet the required qualification standards. Olama was selected as the flag bearer for both the opening and closing ceremonies. Both athletes did not advance beyond the first round of their respective events.
Sierra Leone competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This marked the nation's tenth appearance at the Summer Olympics since its debut in the 1968 Summer Olympics. The Sierra Leone delegation included two track and field athletes; Ibrahim Turay, a sprinter and Ola Sesay, a long jumper. Sesay and Turay were selected as flag bearers for the opening and closing ceremonies respectively. Neither of the two athletes progressed beyond the first round.
Tonga participated in the 2012 Summer Olympics in London, United Kingdom, which were held from 27 July to 12 August 2012. The country's participation in London marked its eighth appearance in the Summer Olympics since its debut at the 1984 Summer Olympics. The delegation included three competitors: two in athletics, Joseph Andy Lui and ʻAna Poʻuhila, along with one short distance swimmer Amini Fonua. The latter entry was Tonga's first appearance in Olympic swimming competition. Lui and Fonua qualified through wildcard places while Po'uhila made the games by meeting qualification standards. Fonua was selected as the flag bearer for the opening ceremony while Lui held it at the closing ceremony. Lui and Fonua failed to progress farther than the preliminary round of their respective events while Po'uhila finished 29th in the heat stage of the women's shot put contest.
Mauritania competed 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 eighth appearance in the Summer Olympics since its debut in the 1984 Summer Olympics. The delegation included two track and field athletes, Jidou El Moctar and Aicha Fall, who were selected to the team by wildcard places, as the nation had no athletes that met either the "A" or "B" qualifying standards. Moctar was selected as flag bearer for the opening ceremony while a LOCOG Games Maker carried it for the closing ceremony. Neither of the two athletes progressed beyond the heats.
Youba Mohamed Ould H'meïde is a retired Mauritanian sprinter, who specialized in the 400 metres. He represented Mauritania at the 2004 Summer Olympics, and also set a national record and a personal best of 47.87 on his sporting debut from the 2001 IAAF World Championships in Edmonton, Alberta, Canada.
Aminata Kamissoko is a Mauritanian sprint athlete.
Equatorial Guinea competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, which was held from 5 to 21 August 2016. The country's participation at Rio marked its ninth appearance in the Summer Olympics since its début in the 1984 Summer Olympics. The delegation included two track and field athletes, Benjamin Enzema and Reïna-Flor Okori who both qualified for the Games through wildcard places since their fastest times did not meet the required qualification standards, Okori was selected as the flag bearer for the opening and closing ceremonies. Enzema did not advance beyond the qualification round for the men's 800 metres event and Okori was unable to start the women's 100 metre hurdles contest.
