Kim Collins is a former Kittitian track and field sprinter. In 2003, he became the World Champion in the 100 metres. He represented his country at the Summer Olympics on five occasions, from 1996 to 2016, and was the country's first athlete to reach an Olympic final. He competed at ten editions of the World Championships in Athletics, from 1995 to 2015, winning five medals. He was a twice runner-up in the 60 metres at the IAAF World Indoor Championships. At regional level, he was a gold medallist at the Commonwealth Games and a silver medallist at the Pan American Games. As of 2023, he is the only Individual World Championships Gold medallist from Saint Kitts and Nevis.
Afghanistan sent a delegation to compete at the 2004 Summer Olympics in Athens, Greece, which were held from 13 to 29 August 2004. This was the eleventh appearance of the nation in the Summer Olympics and their first since their reinstatement to the International Olympic Committee in 2003 following a four-year ban due to the Taliban government's discrimination against women and their opposition to them playing sports. The delegation consisted of five athletes: sprinters Masoud Azizi and Robina Muqimyar, boxer Basharmal Sultani, judoka Friba Rezayee and wrestler Bashir Ahmad Rahmati. Muqimayar and Rezayee's inclusion in the Afghan delegation marked the first time the country sent a woman athlete to a Summer Olympics. All five failed to progress any further than the preliminary round of their respective sports and Afghanistan's best performance at the Games was by Muqimayar who set a new national women's 100 metre record in her heat.
Justin Alexander Gatlin is a retired American sprinter who competed in the 60 meters, 100 meters, and 200 meters. He is the 2004 Olympic Champion in the 100 meters, the 2005 and 2017 World Champion in the 100 meters, the 2005 World Champion in the 200 meters, and the 2019 World Champion in the 4 x 100 meters relay. In addition, Gatlin is the 2003 and 2012 World Indoor Champion in the 60 meters. He is a 5-time Olympic medalist and a 12-time World Championship medalist. At the World Athletics Relays, Gatlin won two gold medals in the 4 x 100 meters relay in 2015 and 2017. Gatlin is also a record 3-time Diamond League Champion in the 100 meters. He won the Diamond League trophy in 2013, 2014 and 2015.
Shingo Suetsugu is a Japanese sprinter. He is a former Asian record holder in the 200 metres and 4×100 metres relay.
Stéphan Buckland is a retired Mauritian track and field athlete who competed in the 100 and 200 metres.
Tyson Gay is a retired American track and field sprinter who competed in the 100 and 200 meters. His 100 m personal best of 9.69 seconds is the American record and makes him tied for the second fastest athlete over 100 m ever, along with Yohan Blake of Jamaica.
Oludamola Bolanle ("Damola") Osayomi is a Nigerian sprinter who specializes in the 100 metres and 200 metres. She is a four-time gold medallist at the African Championships in Athletics and won an Olympic silver medal with Nigeria in the 4×100 metres relay at the 2008 Beijing Olympics. She also won the 100 and 200 m sprints at the 2007 All-Africa Games.
Blessing Oghnewresem Okagbare-Otegheri is a former Nigerian track and field athlete who specialized in long jump and sprints. She is an Olympic and World Championships medallist in the long jump and a world medalist in the 200 metres. Okagbare also holds the women's 100 metres Commonwealth Games record at 10.85 seconds. She is currently serving a 10-year ban for breaching multiple World Athletics anti-doping rules. Her ban expires on 30 July 2032.
Richard "Torpedo" Thompson is a sprinter from Trinidad and Tobago who specializes in the 100 metres. His personal best of 9.82 seconds, set in June 2014, was one of the top ten fastest of all time, and a national record. In the 200 meters, he has the fourth fastest time by a Trinidad and Tobago athlete.
The Republic of the Congo sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Djibouti 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 sixth appearance in the Summer Olympics since its debut in 1984. The Djibouti delegation included two athletes in 2008; Mahamoud Farah, a middle-distance runner, and Fathia Ali Bouraleh, a sprinter. Hussein Ahmed Salah, Djibouti's only Olympic medalist, was selected as the flag bearer for both the opening and closing ceremonies despite not competing in 2008. None of the Djiboutian athletes progressed further than the heat round.
Ali Shareef is a track and field sprint athlete who competes internationally for the Maldives.
Calvin Kang is a track and field sprint athlete who competes internationally for Singapore. He specialises in the 100m sprint, but also runs the 200m and 4 × 100 m events.
Kelly-Ann Kaylene Baptiste is a Tobagonian track and field sprint athlete.
Semoy Kee-Ann Hackett is a Tobagonian track and field sprint athlete who competed collegiately at Louisiana State University. Her personal best in the 100m is 11.09, and 22.49 in 200m.
Rosângela Cristina Oliveira Santos is an American-born Brazilian track and field sprint athlete.
Patrick "Pat" Jarrett is a Jamaican sprinter who specialised in the 100 metres. He represented Jamaica at the 2000 and 2004 Summer Olympics. He was also the 1999 Jamaican 100 m champion and a quarter-finalist at the 1999 World Championships in Athletics.
Su Bingtian is a professional Chinese track and field athlete specializing in the 100 metres event. As of 2022, he is the only sprinter of non-African descent to run the 100 m with sub-9.90 and sub-9.85, and the first ever Asian-born sprinter to break the 10-second barrier. Su's personal best of 9.83 seconds makes him the 5th fastest man all-time in the history of 100 metres at the Olympics, the 15th fastest man all-time in the history of the 100m event, and the current holder of the 100 m Asian record. Su's personal best in the 60 metres of 6.42 seconds placed him within the top six all-time in the event.
Alissa Kallinikou is a Cypriot sprinter, who specialized in the 400 metres. She set a personal best time of 52.05 seconds, by winning the women's 400 metres at the 2008 Greek National Championships in Athens, Greece, earning her a spot on the Cypriot team for the Olympics.
The 100 metres at the World Championships in Athletics has been contested by both men and women since the inaugural edition in 1983. It is the second most prestigious 100 m title after the 100 metres at the Olympics. The competition format typically has two or three qualifying rounds leading to a final between eight athletes. Since 2011 a preliminary round has been held, where athletes who have not achieved the qualifying standard time compete to enter the first round proper.
Afghanistan 
