Amanda Jo Weir is an American competition swimmer, Olympic silver medalist, world champion, and former world record-holder. She was a member of the 2004 and 2012 United States Olympic teams, winning two silver medals at the 2004 Games and a bronze medal in the 4×100-meter freestyle relay at the 2012 Summer Olympics and a silver medal in the 4×100-meter freestyle relay at the 2016 Summer Olympics.
Indonesia competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. At the games, twenty-two Indonesians had qualified to compete, while the other three had been granted a wildcard entry.
The Bahamas sent a delegation of athletes to compete in the 2008 Summer Olympics, which were held in Beijing, People's Republic of China from 8 to 24 August 2008. Its Beijing appearance marked its fourteenth time at the Olympics since its début at the 1952 Summer Olympics in Helsinki. The delegation included 25 athletes across four sports and nineteen distinct events. Its athletes advanced to semifinals in eight events and finals in five events, medaling in two of them. The Bahamian delegation was one of the largest sent between its début and 2008. The country's flag bearer was Debbie Ferguson-McKenzie.
Puerto Rico competed in the 2008 Summer Olympics which was held in Beijing, People's Republic of China from August 8 to August 24, 2008. The American territory with a population of four million people qualified 22 athletes in eight different sports. The appearance of the Puerto Rican delegation at the Beijing Olympics marked the commonwealth's sixteenth consecutive appearance at the Summer Olympics, and its twenty-second appearance at any Olympic Games, since its debut at the 1948 Summer Olympics in London, England. Of its competitors participating in events that involve progression by heats, six athletes advanced at least one round in their events, and two advanced at least two rounds, with Asunción Ocasio almost medaling bronze in taekwondo. However, there were no Puerto Rican medalists at the Beijing Olympics. McWilliams Arroyo, a boxer, bore Puerto Rico's flag at the ceremonies.
Jamaica sent a delegation to compete at the 2008 Summer Olympics, held in Beijing, China from August 8 to August 24, 2008. This was, by far, Jamaica's best showing at the Summer Olympics; it was the nation's largest delegation yet, and its athletes nearly doubled its total gold medal count in addition to breaking the nation's record for number of medals earned in a single games. Jamaica's appearance at Beijing was its fifteenth consecutive appearance and appearance as an independent nation, although it had previously participated in four other games as a British colony and as part of the West Indies Federation. In the 29 events that included Jamaican athletes, there were 26 cases in which a Jamaican athlete or relay progressed to a final round. Usain Bolt won three of Jamaica's six gold medals at Beijing, breaking an Olympic and world record in all three of the events in which he participated. Shelly-Ann Fraser led an unprecedented Jamaican sweep of the medals in the Women's 100 m. Female sprinter Veronica Campbell-Brown carried Jamaica's flag at the ceremonies.
Mary Elizabeth Mohler is an American former competition swimmer and former world record-holder in the Women's 200-meter butterfly.
Barbados sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. The island nation made its tenth appearance as an independent nation upon its arrival in Beijing. Eight athletes across three sports and ten events represented Barbados, marking the smallest delegation in its history up to the Beijing Games. Its runners and swimmers advanced past the first rounds in their events in four of their nine events, although none advanced to their events' final rounds or medaled. The nation's flagbearer during the Beijing Games was swimmer Bradley Ally.
Suriname sent a delegation of four people to compete at the 2008 Summer Olympics in Beijing, China: two athletes (Jurgen Themen and Kirsten Nieuwendam and two swimmers who participated in four distinct events. The appearance of Suriname at Beijing marked its tenth Olympic appearance, which included every Olympic games since the 1968 Summer Olympics in Mexico City and excluded the 1980 Summer Olympics in Moscow. Its four athletes did not advance past the first round in each of their events. The Surinamese flag bearer in Beijing was not an athlete, but Anthony Nesty, the only medalist in Surinamese history and the nation's Olympic swimming coach.
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.
The Republic of the Congo sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Niger sent five athletes, their second largest contingent ever, equalling the most sports in which they have participated. to compete at the 2008 Summer Olympics in Beijing, China. It was Niger's 10th Olympics; their only medalist has been Issaka Dabore, in boxing, at the 1972 games.
Allison Rodgers Schmitt is an American competition swimmer who specializes in freestyle events. She is a four-time Olympian and a ten-time Olympic medalist.
Jill Ann Sterkel is an American former competition swimmer, Olympic champion, former world record-holder, and water polo player. Sterkel won four medals in three Olympic Games spanning twelve years. She was the women's head coach of the Texas Longhorns swimming and diving team at the University of Texas at Austin from 1992 to 2007.
Comoros competed at the 2012 Summer Olympics in London, England, which was held from 27 July to 12 August 2012. The country's participation at London marked its fifth appearance in the Summer Olympics since its début at the 1996 Summer Olympics. The delegation included two track and field athletes: Maoulida Darouèche and Feta Ahamada, and one swimmer, Ayouba Ali Sihame, all three qualified for the Games through wildcard places. Ahamada was selected as the flag bearer for the opening ceremony and Darouèche held it at the closing ceremony. Ahamada won her heat in the preliminary round of the women's 100 metres but was eliminated in the heat stages, while Darouèche and Sihame did not advance beyond the first round of their respective events.
Claire Christine Donahue is an American competition swimmer. She won two gold medals at the 2011 Pan American Games and finished second at the 2011 National Championships in the 100-meter butterfly. She earned a gold medal for swimming in the preliminary heats of the 4×100-meter medley relay at the 2012 Summer Olympics.
Renee A. Laravie, also known by her married name Renee Kelly, is an American former competition swimmer who specialized in the breaststroke.
Pernille Blume is a former Danish swimmer specializing in sprint freestyle events. She competed at the 2012 Summer Olympics. At the 2016 Summer Olympics she was the gold medalist in the women's 50 metre freestyle and won a bronze medal in the women's 4 × 100 metre medley relay where she swam the freestyle leg of the relay in both the prelims and the final. She also competed at the 2020 Summer Olympics, winning a bronze medal in the 50 metre freestyle.
Eygló Ósk Gústafsdóttir is an Icelandic swimmer. She competed at the 2012 Summer Olympics in the women's 100 metre backstroke, finishing 2nd in her heat but in 32nd place overall in the heats, failing to qualify for the semifinals.
Jeanne Courtney Hallock, also known by her married name Jeanne Craig, is an American former competition swimmer.
Eydis Konráðsdóttir is an Icelandic former swimmer, who specialized in sprint butterfly events. She represented Iceland in two editions of the Olympic Games, and also held an Icelandic record in the 100 m butterfly until it was later broken by Kolbrún Yr Kristjánsdóttir and Sarah Blake Bateman within the 2000s decade. Konradsdottir is a medicine undergraduate at the University of New South Wales, and also married to Australia's medley swimmer and three-time Olympian Matthew Dunn.
Iceland 
