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.
Mauritania competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its sixth appearance in the Summer Olympics since its debut in the 1984 Summer Olympics. The delegation included two track and field athletes, Youba Hmeida and Aminata Kamissoko, who were both selected by wildcards after both failed to meet either the "A" or "B" qualifying standards. Hmeida was selected as the flag bearer for the opening ceremony. Neither of the Mauritanians progressed beyond the heats.
Mauritania sent a delegation to compete at the 2000 Summer Olympics in Sydney, Australia from 15 September to 1 October 2000. This was the African nation's fifth time competing at the Summer Olympic Games. The Mauritanian delegation consisted of two track and field athletes, Sidi Mohamed Ould Bidjel and Fatou Dieng. Neither advanced beyond the first round of their respective events.
Mauritania has sent Olympians to every celebration of the modern Summer Olympic Games held since 1984, and has yet to win an Olympic medal. Mauritania has also yet to compete in any Winter Olympic Games.
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.
Mauritania competed at the 2010 Summer Youth Olympics, the inaugural Youth Olympic Games, held in Singapore from 14 August to 26 August 2010.
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.
During the parade of nations portion of the 1984 Summer Olympics opening ceremony, athletes from each country participating in the Olympics paraded in the arena, preceded by their flag. The flag was borne by a sportsperson from that country chosen either by the National Olympic Committee or by the athletes themselves to represent their country.
Mauritania 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 de Janeiro marked its ninth appearance in the Summer Olympics since its debut at the 1984 Summer Olympics in Los Angeles.
Abidine Abidine is a Mauritanian long-distance runner. He competed in the 5000 metres event at the 2020 Summer Olympics.
