Djibouti has participated in nine Summer Olympic Games as of the completion of the 2020 Summer Olympics in Tokyo. They have never competed in the Winter Olympic Games. Djibouti debuted at the 1984 Summer Olympics in Los Angeles, United States of America with three athletes, but did not take home a medal. The highest number of Djiboutian athletes participating in a summer Games is eight in the 1992 games in Barcelona, Spain. Only one Djiboutian athlete has ever won a medal at the Olympics, marathon runner Hussein Ahmed Salah, who won a bronze medal in the 1988 marathon.
Swaziland sent a delegation to compete at the 2008 Summer Olympics held in Beijing, People's Republic of China from August 8–24, 2008. This was the Kingdom's eighth appearance at a Summer Olympic Games. The Swazi delegation to Beijing consisted of four competitors, two track and field athletes; Isaiah Msibi and Temalangeni Dlamini; and two swimmers; Luke Hall and Senele Dlamini. None of the four advanced beyond the first round of their respective events.
Alejandro Gómez Perez is a Venezuelan swimmer. At the 2012 Summer Olympics in London, he participated in the men's 1500 metre freestyle, but was eliminated in the qualifying heats. His mother Maria competed in the 1976 Summer Olympics in the 200 and 400m freestyle events.
Jan Micka is a Czech swimmer, who specialized in long-distance freestyle events. He is a two-time Czech record holder in the 800 and 1500 m freestyle. Micka is a member of the swimming team for USK Praha, and is coached and trained by Jaroslava Passerova.
Uladzimir Henadzievich Zhyharau is a Belarusian swimmer, who specialized in long-distance freestyle events. Zhyharau qualified for the men's 1500 m freestyle, as a member of the Belarusian swimming team, at the 2012 Summer Olympics in London, by attaining a B-standard entry time of 15:28.22. He challenged six other swimmers on the first heat, including 17-year-old Jan Micka of the Czech Republic and two-time Olympian Ediz Yıldırımer of Turkey. Zhyharau finished the heat in sixth place by nearly fourteen seconds behind Bulgaria's Ventsislav Aydarski, recording the second-slowest time of 15:48.67. Zhyharau failed to advance into the final, as he placed thirtieth overall in the preliminaries.
Paulius Viktoravičius is a Lithuanian swimmer, who specialized in sprint and relay freestyle events. He is a multiple-time Lithuanian swimming champion and record holder in both the freestyle and medley relay events.
Mohammed Rubel Rana is a Bangladeshi swimmer, who specialized in backstroke events. He was one of the five athletes to represent Bangladesh at the 2008 Summer Olympics, rounding out the field of 45 swimmers in the men's 100 m backstroke.
Alain Brigion Tobe is a Cameroonian swimmer, who specialized in sprint freestyle events. Tobe represented Cameroon at the 2008 Summer Olympics in Beijing, and competed for the men's 50 m freestyle. He won the fifth heat in the event, with a time of 24.53 seconds, finishing sixty-first in the overall standings.
William Benson is a New Zealand swimmer, who specialised in freestyle and fly events. He represented New Zealand at the 2008 Summer Olympics in Beijing, and competed as part of the men's national swimming team for the men's 4 × 100 m freestyle relay. Benson joined the team, along with compatriots Cameron Gibson, Mark Herring, and Orinoco Faamausili-Banse, and swam in the third leg of the competition, with an individual split time of 48.65 seconds. He and his swimming team placed sixth in the first heat, and eleventh overall, for a total time of 3:15.41.
Orinoco Faamausili-Banse-Prince is a New Zealand swimmer of Samoan heritage, who specialized in freestyle events. He represented New Zealand at the 2008 Summer Olympics in Beijing, and competed as part of the men's national swimming team for the men's 4 × 100 m freestyle relay. Faamausili-Banse joined the team, along with compatriots Cameron Gibson, Mark Herring, and Willy Benson, and swam in the final leg of the competition, with an individual split time of 48.96 seconds. He and his swimming team placed sixth in the first heat, and eleventh overall, for a total time of 3:15.41.
Aldwyn Sappleton is a Jamaican track and field athlete, who specialized in middle distance running. He won three medals, including gold in the 1500 metres, at the 1999 CARIFTA Games in Fort-de-France, Martinique. He is also a four-time All-American track and field athlete, while playing for the Oklahoma Sooners, at the University of Oklahoma in Norman.
Taylor Milne is a Canadian middle distance runner. Milne made his official debut at the 2008 Summer Olympics in Beijing, where he competed in the 1500 metres. At the 2016 Olympics he was eliminated in the heats of the 3000 m steeplechase.
Konstadina Efedaki is a Greek middle-distance runner. She is a two-time national champion (2003–2004) for the 1500 metres.
Mahrez Mebarek is an Algerian former swimmer, who specialized in freestyle events. He is a multiple-time Algerian record holder in long-distance freestyle.
David Freeman is a Puerto Rican middle distance runner. He was born in Miami,Florida USA and attended Hialeah High School in Hialeah, Florida. David started running Track & Field as a sophomore in high school. David was third in state championship in 800 meters as sophomore, second during his junior year and he won the state championship in the 800 meters during his senior year of high school (2000).
Maciej Hreniak is a Polish swimmer, who specialized in long-distance freestyle events. He represented his nation Poland at the 2008 Summer Olympics, and has won a career total of five medals in a major international competition, spanning the two editions of the European Junior Championships, and the 2006 FINA Youth World Swimming Championships in Rio de Janeiro, Brazil. Hreniak is a member of UKS Ruch Grudziądz, and is coached and trained by Marek Dorywaiski.
Viktar Aliaksandravich Vabishchevich is a Belarusian swimmer, who specialized in breaststroke events. He posted a Belarusian record time of 28.03 seconds in the prelims of the men's 50 m breaststroke at the 2012 European Aquatics Championships in Debrecen, Hungary. He also won a bronze medal in the same event at the 2007 European Junior Swimming Championships in Antwerp, Belgium, clocking at 28.62 seconds.
Fernando Eurico de Barros Oliveira da Fonseca e Costa is a Portuguese former swimmer, who specialized in long-distance freestyle events. He is a two-time Olympian, and currently holds the Portuguese record in the 1500 m freestyle from the 2007 Summer Universiade in Bangkok, Thailand.
Mitchell Kealey is an Australian middle-distance runner. He set his personal best time of 3:36.00, by placing third at the 2010 Sydney Athletics Grand Prix in Sydney, New South Wales. Kealey is also a member of the track and field team, and a graduate of business management at the University of Queensland in Brisbane.
Eswatini 
