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 men's 200 metres at the 2004 Summer Olympics as part of the athletics program was held at the Athens Olympic Stadium from August 24 to 26. There were 54 competitors from 41 nations. The event was won by 0.22 seconds by Shawn Crawford of the United States, the nation's 17th victory in the men's 200 metres after missing the podium entirely four years prior. His teammates Bernard Williams (silver) and Justin Gatlin (bronze) completed the sixth American sweep in the event and first since 1984.
The men's 400 metres at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 20 to 23. Sixty-two athletes from 48 nations competed. The event was won by Jeremy Wariner of the United States, the sixth in what would ultimately be 7 consecutive American victories stretching from 1984 to 2008 and the 18th overall title in the event by the United States. The United States swept the podium for the 4th time in the event.
The women's 400 metres at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 21 to 24. The winning margin was 0.14 seconds.
The women's 400 metres hurdles at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 21 to 25.
The men's 1500 metres at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 20 to 24. Thirty-eight athletes from 26 nations competed. The event was won by Hicham El Guerrouj of Morocco, the nation's first title in the event after coming second twice ; El Guerrouj was the fifth man to win a second medal in the event. Bernard Lagat's silver put Kenya on the podium in the event for the third straight year; the United States and Great Britain were the only other nations to have accomplished that. It also made Lagat the sixth man to win two medals in the event, just behind El Guerrouj in both 2000 and 2004. Rui Silva's bronze was Portugal's first medal in the event.
The men's 4 × 400 metres relay at the 2004 Summer Olympics as part of the athletics program was held at the Athens Olympic Stadium from August 27 to 28. The sixteen teams competed in a two-heat qualifying round in which the first three teams from each heat, together with the next two fastest teams, were given a place in the final race.
The men's 400 metres hurdles was an event at the 1996 Summer Olympics in Atlanta, Georgia. There were 55 competitors from 35 nations. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Derrick Adkins of the United States, the nation's fourth consecutive and 16th overall victory in the event. Samuel Matete of Zambia earned that nation's first medal in the event with his silver. American Calvin Davis took bronze.
The men's 400 metres hurdles at the 2008 Summer Olympics took place on 16–18 August at the Beijing National Stadium. There were 26 competitors from 19 nations. The event was won by Angelo Taylor of the United States, the nation's 18th victory in the men's 400 metres hurdles. Taylor was the seventh man to win multiple medals in the event, and third to win two golds. The United States completed its fifth podium sweep in the men's long hurdles, as Kerron Clement and Bershawn Jackson took silver and bronze.
The men's 400 metres hurdles at the 1980 Summer Olympics in Moscow, Soviet Union had a start list of 22 competitors from 19 nations, with three quarterfinals, two semifinals (16), and a final (8) that took place on Saturday July 26, 1980. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Volker Beck of East Germany, the nation's first medal in the event. Vasyl Arkhypenko earned silver, the second consecutive Games that the Soviet Union reached the podium in the event. Gary Oakes put Great Britain back on the podium after a one-Games absence with his bronze.
The men's 400 metres hurdles at the 2009 World Championships in Athletics was held at the Olympic Stadium on 15, 16 and 18 August.
The women's 400 metres hurdles at the 2009 World Championships in Athletics was held at the Olympic Stadium on 17, 18 and 20 August.
The men's 400 metres competition at the 2012 Summer Olympics in London, United Kingdom, was held at the Olympic Stadium on 4–6 August. Forty-nine athletes from 38 nations competed. The event was won by 0.52 seconds by Kirani James of Grenada, earning the country its first Olympic medal. Luguelín Santos's silver was the Dominican Republic's first medal in the men's 400 metres. Lalonde Gordon's bronze was Trinidad and Tobago's first medal in the event since 1964.
The men's 400 metres hurdles competition at the 2012 Summer Olympics in London, United Kingdom took place on 3–6 August at the Olympic Stadium. There were 49 competitors from 33 nations. The event was won by Félix Sánchez of the Dominican Republic, the second victory in the men's long hurdles for both the man and the nation. Sánchez was the eighth man to win multiple medals in the event and fourth to win two golds. Michael Tinsley of the United States earned silver. Javier Culson's bronze was Puerto Rico's first medal in the event.
The men's 110 metre hurdles at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 24 to 27. Forty-seven athletes from 34 nations competed. The event was won by Liu Xiang of China, the nation's first medal in the event. Terrence Trammell and Anier García became the 11th and 12th men to win multiple medals in the 110 metres hurdles.
The men's 400 metres event at the 2016 Summer Olympics took place between 12 and 14 August at the Olympic Stadium. Fifty-three athletes from 35 nations competed. The event was won by 0.73 seconds by Wayde van Niekerk of South Africa, who broke the world record and won the nation's second gold medal in the men's 400 metres. Kirani James of Grenada and LaShawn Merritt of the United States became the sixth and seventh men to win two medals in the event, but Michael Johnson remained the only man with two gold medals.
The men's 110 metres hurdles event at the 2016 Summer Olympics took place between 15–16 August at the Olympic Stadium. Forty athletes from 27 nations competed. The event was won by Omar McLeod of Jamaica, the nation's first gold medal and second medal overall in the event. Orlando Ortega's silver was Spain's first medal in the men's high hurdles, while Dimitri Bascou's bronze was France's first medal in the event since 1976.
The men's 400 metres hurdles event at the 2016 Summer Olympics took place between 15–18 August at the Olympic Stadium. There were 47 competitors from 33 nations. The event was won by Kerron Clement of the United States, the nation's 19th victory in the men's long hurdles. Clement became the ninth man to win multiple medals in the event. Both Kenya and Turkey earned their first medals in the men's 400 metres hurdles, the former with Boniface Mucheru Tumuti's silver and the latter with Yasmani Copello's bronze.
The men's 400 metres event at the 2020 Summer Olympics took place between 1 and 5 August 2021 at the Olympic Stadium. Approximately fifty athletes were expected to compete; the exact number was dependent on how many nations use universality places to enter athletes in addition to the 48 qualifying through time or ranking. 48 athletes from 33 nations competed. The event was won by 0.23 seconds by Steven Gardiner of the Bahamas, with Anthony Zambrano of Colombia taking silver. Those were the first medals in the men's 400 metres for each of those two nations. Kirani James of Grenada won his third consecutive medal in the event with his bronze, making him the first man to earn three medals in the 400 metres.
The men's 400 metres hurdles event at the 2020 Summer Olympics took place between 30 July and 3 August 2021 at the Olympic Stadium. 36 athletes from 26 nations competed.
