Jamaica competed at the 1992 Summer Olympics in Barcelona, Spain. 36 competitors, 22 men and 14 women, took part in 23 events in 5 sports.
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.
Tristan Thomas is an Australian track and field athlete specialising in the 400 metres hurdles.
The men's 400 metres hurdles at the 2000 Summer Olympics as part of the athletics programme were held at Stadium Australia on Sunday 24 September, Monday 25 September and Wednesday 27 September 2000. There were 62 competitors from 45 nations. The event was won by Angelo Taylor of the United States, the nation's fifth consecutive and 17th overall victory in the event. Saudi Arabia and South Africa each earned their first medals in the men's 400 metres hurdles, as Hadi Souan Somayli took silver and Llewellyn Herbert received bronze.
The men's 400 metres hurdles event at the 1960 Olympic Games took place between August 31 and September 2. There were 34 competitors from 23 nations. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Glenn Davis of the United States, the first man to successfully defend an Olympic title in the 400 metres hurdles. As of the 2016 Games, he remains the only man to do so; three others have won two gold medals in the event, but all three did so in nonconsecutive Games. It was the United States' fifth consecutive and 10th overall victory in the event. The Americans also completed their second consecutive medal sweep in the event, as Cliff Cushman took silver and Dick Howard took bronze.
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.
Anna Vasylivna Ryzhykova, nee Yaroshchuk is a Ukrainian track and field athlete who specialises in the 400 metres hurdles. At the European Athletics Championships, she won silver medals in 2012 and 2018, and bronze in 2022. Ryzhykova placed fifth at the 2020 Tokyo Olympics.
Omar Cisneros Bonora is a Cuban track and field athlete who competes in the 400 metres hurdles. He is the Cuban national record holder for the event with his personal best of 47.99 seconds. He won gold medals in the hurdles and 4×400 metres relay at the Pan American Games in 2011.
The men's 400 metres hurdles competition at the 1968 Summer Olympics in Mexico City, Mexico took place on October 13–15 at the Estadio Olímpico Universitario. There were 30 competitors from 24 nations. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by David Hemery of Great Britain, the nation's first victory in the men's 400 metres hurdles since 1928 and second overall—second-most after the United States' 11. The win broke a streak of 6 consecutive American victories. Further, the United States failed to medal in the event for the first time ever; in all 13 previous times the event was held, the American team had at least a silver medalist. Great Britain was the first nation other than the United States to have two medalists in the event in the same Games, as John Sherwood took bronze. Gerhard Hennige of West Germany was the first German hurdler to earn a medal in the event, finishing between the two Britons with silver.
Karsten Warholm is a Norwegian sprinter who competes in the 400 metres and 400 m hurdles. He is the 2020 Tokyo Olympic champion, a three-time world champion and the world record holder in the latter event.
Meghan Beesley is an English track and field athlete specialising in the 400 metres hurdles. She competed at the 2013 World Championships narrowly missing the final. Earlier in her career, she also competed in the heptathlon. Beesley broke the world record for the rarely contested straight 200 metres hurdles by 0.69 seconds at the 2014 Great City Games in Manchester.
Yasmani Copello Escobar is a Cuban-born track and field hurdler who represents Turkey internationally. His personal best for the 400 metres hurdles is 47.81 seconds, set in the final of the 2018 European Athletics Championships in Berlin.
Janieve Russell is a Jamaican track and field athlete who competes mainly in the 400 metres hurdles and the 400 metres sprint. She won an Olympic bronze medal in the 4 × 400 m relay in Tokyo 2021, where she also finished fourth in the 400m hurdles final in a personal best of 53.08 secs. She is a four-time Commonwealth Games gold medallist, winning the 400m hurdles title in 2018 and 2022, and the 4 × 400 m relay in 2014 and 2018. She has also won two relay silvers at the World Championships and a relay gold at the World Indoor Championships.
Ali Khamis Abbas Ali Khamis is a Bahraini track and field athlete who competes mainly in the 400 metres sprint and 400 metres hurdles. His personal best for the flat event is 44.36 seconds, set in 2013, while his hurdles best is 49.55 seconds, set in 2014. He was the 2014 Asian Games champion in the hurdles and the runner-up in the sprint at the 2013 Asian Athletics Championships
Sam Turner is an American male former track and field hurdler who competed in both the 110-meter hurdles and 400-meter hurdles.
Gerald David Drummond Hernández is a Costa Rican athlete specialising in the 400 metres hurdles. He has won multiple medals at regional level. In addition, he is his country's national record holder in the event. He competed at the 2020 Summer Olympics.
Alfredo Emilio Sepúlveda Sandoval is a Chilean athlete specialising in the 400 metres hurdles. He won a silver medal at the 2018 South American Games in a new national record of 49.62.
Rai Benjamin is an American professional hurdler and sprinter specializing in the 400 m and 400 m hurdles. He is the second fastest man in history in the 400 m hurdles with a personal best time of 46.17 s. Benjamin won silver medals at his first Olympic Games in 2021 and at the World Championships in 2019 and 2022 in the men's 400 m hurdles, and gold medals in the 4 × 400 m relay in 2019 and 2021.
Hanne Claes is a Belgian athlete specialising first in the 200 metres and later 400 metres hurdles.
Tunisia 
