The men's 100 metre freestyle event at the 2004 Summer Olympics was contested at the Olympic Aquatic Centre of the Athens Olympic Sports Complex in Athens, Greece on August 17 and 18. There were 69 competitors from 62 nations. Nations had been limited to two swimmers each since the 1984 Games.
The men's 200 metre individual medley event at the 2004 Olympic Games was contested at the Olympic Aquatic Centre of the Athens Olympic Sports Complex in Athens, Greece on August 18 and 19.
Trinidad and Tobago competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixteenth appearance at the Summer Olympics as an independent nation, although it had previously appeared in four editions as part of the British colony and the West Indies Federation. Trinidad and Tobago Olympic Committee sent a total of nineteen athletes to the Games, ten men and nine women, to compete only in track and field, shooting, swimming, and taekwondo, which made its Olympic debut; the nation's team size was relatively similar to the record in Sydney four years earlier.
Oussama "Ous" Mellouli is a Tunisian swimmer who competes in the freestyle and medley events. He is a three-time Olympic medalist, is an African record holder, and trains with the USC Trojans team based at the University of Southern California, where he studied as a computer science undergraduate and swam collegiately.
Bronte Amelia Arnold Barratt, OAM is a retired Australian competitive swimmer and Olympic gold medallist.
Brenton Scott Rickard is a retired breaststroke swimmer from Australia. He emerged at the international level in 2006, swimming at the Commonwealth games. He has captured multiple Olympic and World Championship medals, as well as world and Commonwealth records. During this period he was coached by Vince Raleigh.
Trinidad and Tobago sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. Its participation in the Beijing games marked its eighteenth Olympic appearance and fifteenth Summer Olympic appearance since its debut at the 1948 Summer Olympics in London, excluding its joint participation with Jamaica and Barbados in 1960 as the West Indies Federation. With 28 athletes, more Trinidadians had competed at the Olympics than in any other single Olympic Games in its history before Beijing. Athletes representing Trinidad and Tobago advanced past the preliminary or qualification rounds in twelve events and reached the final rounds in four of those events. Of those four events, silver medals were won in the men's 100 meters and in the men's 4x100 meters relay. The latter was upgraded to gold due to one member of the quartet that crossed the line first, Nesta Carter, testing positive for a banned substance, resulting in their disqualification. The nation's flag bearer at the opening ceremony that year was swimmer and Athens medalist George Bovell.
Christian David Sprenger is an Australian former breaststroke swimmer. He trains at the Commercial Swimming Club under Simon Cusack.
Alia Shanee Atkinson, OD is a Jamaican five-time Olympian and a former competitive swimmer whose international competition career spanned 19 years, 2003 to 2021 inclusive, at the senior level. At short course World Swimming Championships, she is a ten-time medalist in individual events, including four gold medals, four silver medals, and two bronze medals. She won a total of 124 medals, of which 74 were gold medals, at Swimming World Cup circuits over the course of her career. She won 14 total medals in individual events, 11 gold, 1 silver, and 2 bronze, from her first three Central American and Caribbean Games, in 2006, 2010, and 2018.
Sharntelle Sharon Tamika Cyren McLean is a 2-time Olympic swimmer from Trinidad and Tobago. She swam for Trinidad and Tobago at the 2004 and 2008 Olympics. Beginning in 2005, she has attended and swam for the United States' University of South Carolina.
Chad Guy Bertrand le Clos, OIS is a South African competitive swimmer who is an Olympic, World and Commonwealth Games champion. He is the African record, Commonwealth record, and South African record holder in the short course and long course 200-metre butterfly and the short course 100-metre butterfly. He also holds the African records and South African records in the long course 200-metre freestyle and 100-metre butterfly, and the short course 100-metre freestyle. Formerly, he was a world record holder in the short course 100-metre butterfly and 200-metre butterfly.
Trinidad and Tobago competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was Trinidad and Tobago's most successful Summer Olympics. It was the nation's largest ever delegation sent to the Olympics, with a total of 30 athletes, 21 men and 9 women, in 6 sports. Trinidad and Tobago's participation in these games marked its sixteenth Olympic appearance as an independent nation, although it had previously competed in four other games as a British colony, and as part of the West Indies Federation. The nation was awarded four Olympic medals based on the efforts by the athletes who competed in the track and field. Javelin thrower Keshorn Walcott became the first Trinidadian athlete to win an Olympic gold medal since the 1976 Summer Olympics in Montreal, where Hasely Crawford won for the sprint event. Marc Burns, a four-time Olympic athlete and a relay sprinter who led his team by winning the silver medal in Beijing, was the nation's flag bearer at the opening ceremony.
Bronte Campbell is a Malawian-born Australian competitive swimmer, a dual Olympic gold-medal winner and world champion. Her older sister, Cate, is also a competitive swimmer, and once held world records in both the short and long course 100 metre individual freestyle events. Bronte and Cate are the first Australian siblings on the same Olympic swimming team since the 1972 Olympics and the first Australian sisters ever to compete within the same swimming event at the Olympics. Bronte Campbell won three gold medals at the 2015 World Championships, including the 50 and 100 metre freestyle events.
Park Seon-Kwan is a South Korean swimmer, who specialized in backstroke events. He won a bronze medal, as a member of the South Korean swimming team, in the 400 m freestyle relay at the 2010 Asian Games in Guangzhou, China. He also collected two silver medals in the 100 and 200 m backstroke at the 2009 East Asian Games in Hong Kong, China. Park is a member of the swimming team at Korea National Sports University in Seoul.
Daniel Goodfellow is a British diver, two-time Commonwealth champion and Olympic bronze medalist. He first represented Great Britain as a senior at the 2013 European Diving Championships in the 10 m platform event and the 2013 World Aquatics Championships in the same event. Goodfellow won a bronze medal in the Men's 10m Synchronised Platform event with his diving partner Tom Daley at the 2016 Summer Olympics in Rio de Janeiro. He has also won a gold with Daley in the same event at the Commonwealth Games, and a silver at the European Championships. In 2022 he won his first major title as a solo diver, winning gold in the men's 3 metre springboard at the 2022 Commonwealth Games
Emma Jennifer McKeon, is an Australian competitive swimmer. She is a seven-time world record holder, three current and four former, in relays. Her total career haul of 11 Olympic medals following the 2020 Olympic Games made her Australia's most decorated Olympian and included one gold medal from the 2016 Summer Olympics in Rio de Janeiro and four gold medals from the 2020 Summer Olympics in Tokyo. With four gold and three bronze medals she was the most decorated athlete across all sports at the 2020 Summer Olympics, and tied for the most medals won by a woman in a single Olympic Games. She has also won 17 medals, including four gold medals, at the World Aquatics Championships; and a record 20 medals, including 14 gold, at the Commonwealth Games.
Trinidad and Tobago competed at the 2016 Summer Olympics in Rio de Janeiro, from August 5 to 21, 2016. This was the nation's seventeenth appearance at the Summer Olympics, although it previously competed in four other editions as a British colony, and as part of the West Indies Federation.
Luke Greenbank is an English professional swimmer who specialises in backstroke. A medalist in the 200 metre backstroke at the Olympic Games and the World and European championships, he also swam the first leg in the 2019 World and 2020 European Championship gold medal-winning Great Britain medley relay teams. He won a silver medal as lead-off for Great Britain in the 4 x 100 metre medley relay for men at the 2020 Summer Olympics. He won a gold medal as lead-off for England in the heats of the 4 x 100 metre medley relay for men at the 2022 Commonwealth Games.
Kyle Chalmers, is an Australian competitive swimmer. He is a world record holder in the short course 100 metre freestyle, 4×100 metre medley relay, and long course 4×100 metre mixed freestyle relay. He is the Oceanian and Australian record holder in the short course 50 metre butterfly and 50 metre freestyle.
Dylan Carter is a Trinidad and Tobago competitive swimmer. He is the Trinidad and Tobago record holder in the long course and short course 100 metre freestyle, 50 metre backstroke, 100 metre backstroke, 50 metre butterfly, and 100 metre butterfly. At the 2021 World Short Course Championships, he became the first swimmer representing Trinidad and Tobago to win a silver medal a World Short Course Championships, winning the silver medal in the 50 metre butterfly. In 2018 and 2022, he won the bronze medal in the 50 metre butterfly and the 50 metre freestyle at the World Short Course Championships, respectively. He was the male overall winner for the 2022 FINA Swimming World Cup, winning nine gold medals, five in Trinidad and Tobago record times, to become the first Trinidad and Tobago overall winner. He is of Portuguese descent
Trinidad and Tobago 
