Ato Jabari Boldon is a Trinidadian former track and field athlete, politician, and four-time Olympic medal winner. He holds the Trinidad and Tobago national record in the 50, 60 and 200 metres events with times of 5.64, 6.49 and 19.77 seconds respectively, and also the Commonwealth Games record in the 100 m. He also held the 100m national record at 9.86s, having run it four times until Richard Thompson ran 9.85s on 13 August 2011.
South Africa competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixteenth overall and fourth consecutive appearance at the Summer Olympics in the post-apartheid era. The South African Sports Confederation and Olympic Committee (SASCOC) sent a total of 106 athletes to the Games, 66 men and 40 women, to compete in 19 sports. Field hockey was the only team-based sport in which South Africa had its representation at these Games. There was only a single competitor in archery, canoeing, diving, artistic and rhythmic gymnastics, judo, sailing, shooting, taekwondo, and wrestling.
Portugal competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Portuguese athletes have competed at every Summer Olympic Games in the modern era since 1912. The Olympic Committee of Portugal sent the nation's second-largest team to the Games. A total of 81 athletes, 64 men and 17 women, were selected by the committee to participate in 15 sports. Men's football was the only team-based sport in which Portugal had its representation at these Games. There was only a single competitor in badminton, canoeing, equestrian, artistic and trampoline gymnastics, triathlon, and wrestling, which made its official Olympic comeback after an eight-year absence.
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 women's heptathlon competition at the 2004 Summer Olympics in Athens was held at the Olympic Stadium on 20–21 August.
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.
Henry Dinwoodey Marsh is a retired runner from the United States, who made four U.S. Olympic teams and represented his native country in the men's 3,000 meter Steeplechase in three Summer Olympics, from 1976 through 1988.
Kelly-Ann Kaylene Baptiste is a Tobagonian track and field sprint athlete.
Ayanna Hutchinson is a track and field sprint athlete who competes internationally for Trinidad and Tobago.
Brianne Theisen-Eaton is a retired Canadian track and field athlete who competed in the heptathlon and women's pentathlon. She won the bronze medal at the 2016 Summer Olympics. Theisen-Eaton holds the Canadian record for the heptathlon with 6,808 points, as well as the indoor pentathlon with a score of 4768 points. Theisen-Eaton is a heptathlon silver medallist from the 2013 World Championships and 2015 World Championships, as well as a pentathlon silver medalist from the 2014 World Indoor Championships. She is the first and only Canadian woman to podium in the multi-events at the World Championships. Theisen-Eaton won Commonwealth Games gold in the heptathlon at Glasgow 2014 and was the 2016 World Indoor Champion in the pentathlon. She also won a bronze medal as part of the women's 4 x 400 m relay at the 2015 Pan American Games in Toronto.
Siobhan Trichelle Cropper is a 2-time Olympian and swimmer from Trinidad and Tobago, who specialized in sprint freestyle and butterfly events. Cropper represented Trinidad and Tobago in two editions of the Olympic Games, and eventually captured the 100 m butterfly title at the 1998 Central American and Caribbean Games in Maracaibo, Venezuela. She also holds three Trinidadian records in a sprint freestyle and butterfly double, two NCAA championship titles and fourteen All-American honors, while attending Stanford University.
Yuliana Pérez Martinéz is an American triple jumper of Cuban heritage. Holding a dual citizenship to compete internationally, she attained two U.S. outdoor championship titles in the triple jump, picked up a silver medal at the 2003 Pan American Games in Santo Domingo, Dominican Republic, and finished twenty-eighth at the 2004 Summer Olympics. During her track and field career, Perez has acquired a personal best of 14.23 m and 13.80 m each in the outdoors and indoors, respectively.
Leif Hilding Arrhenius is a professional American-Swedish athlete competing in the shot put and discus throw. He represented Team Sweden at two World and three European Championships. In addition, he is the 2011 U.S. Collegiate Indoor Champion.
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.
Yuliya Yuriïvna Akulenko is a retired Ukrainian heptathlete. She represented her nation Ukraine at the 2004 Summer Olympics, finishing in twenty-third position, and also set her own personal best of 6203 points at a national meeting in Kyiv. Akulenko is also a member of the track and field squad for Dynamo Dnipropetrovsk.
Magdalena Szczepańska is a retired Polish heptathlete. She won a silver medal at the 2004 European Combined Events Cup in Hengelo, Netherlands, and then represented her nation Poland in heptathlon at the Olympics in Athens a few months later, finishing in twenty-first place. Szczepańska trained under the tutelage of head coach Jerzy Skucha for the national team, while competing at AZS AWFiS Gdańsk.
Tatyana Vladimirovna Gordeyeva is a retired Russian heptathlete. She has won a total of two medals, a silver and a bronze, in heptathlon at the European Cup Super League, and has been selected to compete for Russia at the 2004 Summer Olympics, but later withdrew from the meet after falling at one of the hurdles in the opening heat. Gordeyeva trained under the tutelage of head coach Mikhail Zatselyapin for the national track and field team in combined events, while serving as a member of the Russian Army in her native Volgograd.
Michaela Hejnová is a Czech former track and field athlete, specializing in the heptathlon. She has competed for the Czech Republic at the 2004 Summer Olympics and has won a bronze medal in heptathlon at the 2003 Summer Universiade in Daegu, South Korea. Hejnova set a personal best score of 6065 points at a national meet in Hradec Králové. While competing at PSK Olymp Praha in Prague, Hejnova trains for the national track and field team in heptathlon under the tutelage of her personal coach Martina Blažková.
Chari Wanda Hawkins is an American track and field athlete who competes in combined events. She won the 2022 U.S. Indoor Pentathlon title and has represented the U.S. in the heptathlon at the 2019 World Championships, finishing 12th, and at the 2023 World Championships, finishing 8th.
Rory Linkletter is a Canadian long-distance runner. He represented Canada in the marathon at the 2022 and 2023 World Championships. He holds a personal best of 2:08:01 set at the 2024 Seville Marathon making him the second fastest Canadian of all time over the distance. He formerly held the Canadian half marathon record from January to October 2022 set at the 2022 Houston Half Marathon.
Trinidad and Tobago 
