Dominican Republic at the Olympics

The men's 400 metres hurdles at the 2004 Summer Olympics as part of the athletics program were held at the Athens Olympic Stadium from August 23 to 26. There were 35 competitors from 24 nations. The event was won by Félix Sánchez of the Dominican Republic, the nation's first medal in the men's 400 metres hurdles. Silver went to Danny McFarlane of Jamaica, returning to the podium in the event for the first time since 1992. Naman Keïta's bronze was France's first medal in the event in over 100 years; the last Frenchman to medal in the long hurdles was Henri Tauzin in 1900. The United States' five-Games gold medal streak ended; for only the second time in the history of the event, Americans competed but won no medals.

Cuba competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's seventeenth appearance in the Olympics, except for some editions. Cuban athletes did not attend in two Olympic Games, where they joined the Soviet and North Korean boycott. Cuban Olympic Committee sent the nation's smallest delegation to the Games since 1972. A total of 151 athletes, 97 men and 54 women, competed in 18 sports.

Jamaica competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's fourteenth appearance at the Summer Olympics as an independent nation, although it had previously appeared in the first four editions as a British colony, and as part of the West Indies Federation. The Jamaica Olympic Association sent a total of 47 athletes to the Games, 22 men and 25 women, to compete only in track and field, badminton, shooting, and swimming. For the second consecutive time in Olympic history, Jamaica was represented again by more female than male athletes.

Félix Sánchez, is a retired Dominican-American track and field athlete. He is of Dominican descent, was born and raised in the United States, and competed for the Dominican Republic, specializing in the 400 meter hurdles. He is a two-time Olympic gold medallist, winning gold in 2004 and 2012, and was also World Champion in 2001 and 2003. Just before turning 36, he set the Masters M35 World Record with a time of 48.10. Sanchez acquired many nicknames: "Super Felix", "the Invincible", "Superman", and "the Dictator".

Belize sent a delegation to compete at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the Central American country's ninth appearance at a Summer Olympic Games. The delegation consisted of two track and field athletes: Michael Aguilar and Emma Wade; neither advanced beyond the first round of their events.

Tunisia first participated at the Olympic Games in 1960, and has sent athletes to compete in every Summer Olympic Games except when they participated in the American-led boycott of the 1980 Summer Olympics.

Puerto Rico first participated at the Olympic Games in 1948, and has sent athletes to compete in every Summer Olympic Games since then. Puerto Rico has also participated in the Winter Olympic Games since 1984, but did not participate in the Games of 2006, 2010, and 2014.

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 Dominican Republic competed at the 2012 Summer Olympics in London, United Kingdom, from 27 July to 12 August 2012. This was the nation's thirteenth consecutive appearance at the Olympics.

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.

Dominican Republic competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's fourteenth consecutive appearance at the Summer Olympics.

The Dominican Republic 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. It was the nation's fifteenth consecutive appearance at the Summer Olympics. The Dominican Republic left the Summer Olympics with 3 silver medals and 2 bronze medals with moderate success, but not able to secure a single gold medal in any of the events.

Marileidy Paulino is a Dominican athlete sprinter specializing in the 400 meters. She won the silver medal at the 2020 Tokyo Olympics, becoming the first woman from the Dominican Republic to earn an individual Olympic medal in athletics. At the subsequent Summer Olympics in Paris, she won the gold medal in the 400 metres event, becoming only the third person from the Dominican Republic to win an Olympic gold medal. Paulino also took silver at the 2022 World Athletics Championships. At these competitions, she also earned silver and gold in the mixed 4×400 m relay respectively, running legs of 48.7 s in 2021 and 48.47 s in 2022. Since May 2023, Paulino is the 400 m ranked world No. 1.

Leslie Xcaret Soltero García is a Mexican taekwondo practitioner. She won the gold medal in the women's welterweight event at the 2022 World Taekwondo Championships held in Guadalajara, Mexico. She also won the gold medal in her event at the 2023 Pan American Games held in Santiago, Chile.