Iran competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. The nation has competed at every Summer Olympic games since its official debut in 1948 with the exception of the 1980 and 1984 Summer Olympics. The National Olympic Committee of the Islamic Republic of Iran sent the nation's second-largest delegation to the Games, one less than it sent to Beijing. A total of 53 athletes, 45 men and 8 women, competed in 14 sports. This was also the youngest delegation in Iran's Olympic history, with half the team under the age of 25, and many of them are expected to reach their peak in time for the 2016 Summer Olympics in Rio de Janeiro. Heavyweight boxer Ali Mazaheri was the nation's flag bearer at the opening ceremony.
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.
The Gambia 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 athletes, Suwaibou Sanneh and Saruba Colley, the former had qualified by setting a qualifying time that fell within the required standard and the latter entered via a wildcard place. Sanneh was selected as the flag bearer for both the opening and closing ceremonies. Sanneh became the first Gambian athlete to advance into the semi-finals of the men's 100 metres, while Colley was eliminated after the quarter-final stages of the Women's 100 metres.
The men's 100 metres at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on the 7 and 8 of July.
The women's 400 metres at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on 7 and 8 July.
The wen's 400 metres hurdles at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on 8 and 9 July.
The men's 200 metres at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on 9 and 10 July.
The men's 400 metres at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on the 7 and 8 of July.
The men's 100 metres hurdles at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on the 10 of July.
The men's 400 metres hurdles at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on the 8 and 9 of July.
The men's 4 x 100 metres relay at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on the 8 and 10 of July.
The men's 800 metres at the 2011 European Athletics U23 Championships were held at the Městský stadion on 14 and 15 July.
The women's 200 metres at the 2011 Asian Athletics Championships was held at the Kobe Universiade Memorial Stadium on 9 and 10 July.
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.
The men's cycling team pursuit at the 2016 Summer Olympics in Rio de Janeiro took place at the Rio Olympic Velodrome on 11 and 12 August. Team GB established new Olympic and World Records in both their heat and in the final; their gold medal made Sir Bradley Wiggins Britain's most decorated Olympian.
The men's 100 metres at the 2015 World Championships in Athletics was held at the Beijing National Stadium on 22 and 23 August.
The women's 100 metres hurdles at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 11−12 August.
The men's 100 metres at the 2018 European Athletics Championships took place at the Olympic Stadium on 6 and 7 August. Churandy Martina of the Netherlands was the defending champion, Jak Ali Harvey of Turkey was the defending silver medalist, and Jimmy Vicaut of France was the defending bronze medalist.
The men's 100 metres at the 2019 World Para Athletics Championships was held in Dubai from 7-15 November.
The men's 400 metres hurdles event at the 2021 European Athletics U23 Championships was held in Tallinn, Estonia, at Kadriorg Stadium on 8, 9 and 10 July.
