The men's 100 metres was of one of 23 track events of the athletics at the 2004 Summer Olympics, in Athens. It was contested at the Athens Olympic Stadium, from August 21 to 22, by a total of 82 sprinters from 62 nations. Each nation was limited to 3 athletes per rules in force since the 1930 Olympic Congress.
The Maldives competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The delegation's participation in the Athens Olympics marked the Maldives' fifth appearance at the Summer Olympics since their debut at the 1988 Summer Olympics in Seoul, South Korea. Four athletes competed across two sports; Sultan Saeed and Shifana Ali in track and field, and Hassan Mubah and Aminath Rouya Hussain in swimming. None of the track or swimming athletes advanced past the first round in their events, and no Maldivian has won a medal in any events. Sultan Saeed bore the Maldives' flag during the parade of nations of the opening ceremony.
Leonard ("Leo") Myles-Mills is a Ghanaian former athlete who specialized in the 100 metres. He ran a personal best of 9.98 seconds for the event in 1998, becoming the first Ghanaian to break the 10-second barrier. His best of 6.45 seconds for the 60 metres is an African record. Myles-Mills twice represented his country at the Summer Olympics and also at the Commonwealth Games. He was a two-time NCAA Men's 100 m dash champion while running for Brigham Young University.
The men's 100 metres at the 2000 Summer Olympics as part of the athletics program were held at the Stadium Australia from 22 to 23 September. Ninety-seven athletes from 71 nations competed. Each nation was limited to 3 athletes per rules in force since the 1930 Olympic Congress. The event was won by American Maurice Greene, the United States's first title in the event since 1988 and 15th overall. Ato Boldon of Trinidad and Tobago improved on his 1996 bronze with a silver in Sydney. Obadele Thompson won the first-ever medal in the men's 100 metres for Barbados with bronze.
Aaron Nigel Armstrong is a track and field sprint athlete who competes internationally for Trinidad and Tobago. He is the 2008 Olympic champion in 4 × 100 metres relay.
Jaysuma Saidy Ndure is a Gambian-Norwegian sprinter. He is of Serer heritage of the noble Ndure family. In 2002, he went to Oslo, aged 18 and settled with his father who has lived in Norway since the 1970s. Having changed nationality from Gambia to Norway in 2006, he holds Norwegian records in the 100 and in the 200 metres, and is the seventh and fourth fastest European of all times on the two distances. He has a bronze medal from the African Championships and several top-three placings in IAAF Golden League meets and the IAAF World Athletics Final.
Vida Anim is a Ghanaian sprinter who specializes in the 100 and 200 metres. Together with Mavis Akoto, Monica Twum and Vida Nsiah she holds the Ghanaian record in 4 x 100 metres relay with 43.19 seconds, achieved during the heats at the 2000 Summer Olympics in Sydney.
Simone Collio is an Italian sprinter who specializes in the 60 and 100 metres. His personal best times are 6.55 seconds in the 60 metres (indoor) and 10.06 seconds in the 100 metres, the third all-time best performance in the Italian ranking of 100 meters, after the 10.01 at altitude of Pietro Mennea and 9.99 of Filippo Tortu.
Arnaldo Luís Isaías Abrantes is a Portuguese track and field sprinter, specialising in the distances of 100 metres and 200 metres. He also competes in the 4×100 metres relay. His father, Arnaldo Abrantes, was also a sprinter.
The men's 100 metres sprint event at the 2008 Olympic Games took place on 15 and 16 August at the Beijing National Stadium. Eighty athletes from 64 nations competed. Each nation was limited to 3 athletes per rules in force since the 1930 Olympic Congress. The final was won by Jamaican Usain Bolt in a world record time of 9.69 seconds. It was Jamaica's first title in the event, and first medal in the event since 1976. Jamaica became the first country to join the men's 100 metre winners since Trinidad and Tobago, also in 1976; Richard Thompson won that country's fourth overall medal in the event with his silver.
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.
Masoud Azizi is an Afghan athlete. His personal best time in the 100m sprint is 11.11 seconds, achieved in April 2005 in Mecca. In 2013 Azizi failed a doping test at the 2013 World Championships, and was suspended for two years.
Nataliya Olehivna Pohrebniak is a Russian-Ukrainian sprint athlete who specializes in the 100 metres. Pohrebniak was part of the Ukrainian women's 4 × 100 m that won gold during the 2010 European Athletics with 42.29 – the fastest time in the world that year. She changed her allegiance to Russia after 2016 and began competing in Russian national competitions in 2019.
Bruno Lins Tenório de Barros is a Brazilian sprinter who specializes in the 200 metres.
Grenada competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's eighth consecutive appearance at the Olympics. Few weeks before the Games, Grenadian athletes trained at Broadbridge Heath Leisure Centre near Horsham, West Sussex.
Ghana competed at the 2011 World Championships in Athletics from August 27 to September 4 in Daegu, South Korea.
The African island nation of São Tomé and Príncipe competed at the 2012 Summer Olympics in London, held from 27 July to 12 August 2012. This was the nation's fifth appearance at the Olympics since its debut in 1996. Two track and field athletes, Christopher Lima da Costa and Lecabela Quaresma were selected to the team by wildcard places, without having qualified at any sporting event. Quaresma was selected as flag bearer for the opening and closing ceremonies. Neither of the two athletes progressed beyond the first round of their respective events.
The men's 100 metres event at the 2016 Summer Olympics took place between 13–14 August at the Olympic Stadium. 84 athletes from 57 nations competed.
Djibouti competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. This was the nation's ninth appearance at the Summer Olympics; Djibouti did not field any athletes at the 2004 Summer Olympics in Athens. The delegation consisted of four athletes, three men and one women, competing in five events across three sports. Two athletes participated in the judo and swimming tournaments: Aden-Alexandre Houssein and Houssein Gaber Ibrahim. Athlete Ayanleh Souleiman, a returning competitor from the 2016 Rio Olympics competed in the men's 800 metres and 1500 metres events. Souhra Ali Mohamed, who had previously participated in the 2012 Summer Olympics competed in the women's 1500 metres event. Houssein lead the Djiboutian squad as the flagbearer in the opening ceremony with Souhra being the flagbearer for the closing ceremony.
Saint Kitts and Nevis competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the event was postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. This was the nation's seventh appearance at the Summer Olympics since their debut in 1996. The delegation consisted of two athletes, competing in athletic events; Jason Rogers and Amya Clarke. For the first time, in an effort to promote gender equality, two flagbearers, one male and one female were allowed at the Olympics. Both athletes from Saint Kitts and Nevis bore the national flag at the opening ceremony. Saint Kitts and Nevis did not win any medals during the Tokyo Olympics. Rogers ranked third in the first round of the men's 100 metres and advanced to the semifinals where he was eliminated. Clarke also ranked third in her preliminary round of the women's 100 metres and advanced to round 1 where she ranked 7th and was eliminated.
