Argentina at the 1952 Summer Olympics in Helsinki, Finland was the nation's ninth appearance out of twelve editions of the Summer Olympic Games. Argentina sent to the 1952 Summer Olympics its sixth national team, under the auspices of the Argentine Olympic Committee, 123 athletes, who competed in 77 events in 15 sports They brought home five medals: 1 gold, 2 silver and 2 bronze. The flag bearer was Delfo Cabrera, the gold medalist in the immediately previous Summer Olympic Games marathon.
Lorraine Joyce Thurlow,, née Crapp, is a former Olympic swimming champion representing Australia. In world swimming history, Crapp earned a place as the first woman to break the five-minute barrier in the 400 m freestyle.
Fátima Madrid Calancha is a coach and a former freestyle swimmer from Spain.
Mireia Belmonte García is a Spanish Olympic, world, and European champion swimmer. She is the world record holder in the short course 200 metre butterfly and 400 metre individual medley. Formerly, she held the world record in the short course 400 metre freestyle, 800 metre freestyle, and 1500 metre freestyle. She was the first Spanish woman to win a gold medal in swimming at an Olympic Games and is widely considered to be the greatest Spanish swimmer of all time.
Katalin Szőke was a Hungarian swimmer. She competed at the 1952 Olympics and won two gold medals, in the 100 m and 4 × 100 m freestyle events. Two years later she repeated that success at the 1954 European Championships. She also competed in these two events at the 1956 Olympics but without success. During her career Szőke set four world records. In 1985 she was inducted into the International Swimming Hall of Fame.
Gemma Mengual Civil is a Spanish synchronised swimmer. She has competed at the 2000, 2004 and 2008 Summer Olympics. On 15 February 2012 she announced her retirement. After retiring she became involved with coaching the national synchronised swimming team. However in June 2015 Mengual announced that she would return to competition with the aim of competing at the 2015 World Aquatics Championships in Kazan, Russia, in the mixed duet with Pau Ribas, whom she had previously coached. Although she had previously indicated that she would not compete beyond the World Championships, in September of that year she confirmed via social media that she would compete in the duet in the 2016 Summer Olympics with Ona Carbonell.
Felipe Perrone Rocha is a water polo player. Born in Brazil, he competed for Spain from 2003 until 2013, including in the 2008 Summer Olympics and 2012 Summer Olympics. Afterwards he competed for his birth country in the 2016 Summer Olympics, as Brazil earned its first qualifying spot in 32 years as hosts. He helped Spanish water polo club CN Atlètic-Barceloneta win the LEN Champions League in 2013–14 season. His brother Ricardo Perrone also competed for Spain in water polo.
Mònica Ramírez Abella is an Andorran swimmer. She competed at the 2012 Summer Olympics in the Women's 100 metre backstroke, finishing in 42nd place in the heats, failing to qualify for the semifinals. She also competed in the 50 m freestyle event at the 2013 World Aquatics Championships.
Melania Felicitas Costa Schmid,, also known as Melani Costa, is a Spanish competition swimmer.
Federico Grabich is an Argentine competitive swimmer.
Florent Manaudou is a French competitive swimmer, an Olympic champion of the 50-meter freestyle at the 2012 London Olympics, and the younger brother of Laure Manaudou, a 2004 Olympic gold medalist in swimming. He competes for the Energy Standard Swim Club in the International Swimming League.
Sebastián Rodríguez Veloso is a Spanish Paralympic swimmer. He has competed at four Paralympic Games winning fifteen medals: eight gold, four silver and three bronze. His attendance at the Games was controversial after it was revealed that he had been jailed for bomb attacks while a member of First of October Anti-Fascist Resistance Groups (GRAPO).
Javier Díaz González is a Mexican former swimmer, who specialized in freestyle and individual medley events. He is a two-time Olympian, and a former Mexican record holder in the 50, 100, and 200 m freestyle. Diaz also attended Purdue University in West Lafayette, Indiana, where he majored in economics, and played for the Purdue Boilermakers.
David Julián Levecq Vives is a swimmer from Spain.
José Antonio Marí Alcaraz-Garcia is a swimmer from Spain.
Esther Morales Fernández is an S10 swimmer from Spain.
José Durañona was an Argentine freestyle swimmer who competed at the 1948 Summer Olympics in the 400 m freestyle and 4×200 m freestyle relay, reaching the final in the latter and coming 6th.
Delfina Pignatiello is an Argentine ex-swimmer. She participated in the 2017 FINA World Junior Swimming Championships.
Higinio Ndong Obama Nkara is an Equatoguinean swimmer. He competed at the 2024 Summer Olympics and served as his country's co-flag bearer at the opening ceremony.
