The swimming competitions at the 2020 Summer Olympics in Tokyo were due to take place from 25 July to 6 August 2020 at the Olympic Aquatics Centre. Due to the COVID-19 pandemic, the games were postponed to 2021. However, their official name remained 2020 Summer Olympics with swimming events set for 24 July–1 August 2021 and marathon swimming set for 4–5 August 2021.
The girls' 100 metre backstroke event in swimming at the 2014 Summer Youth Olympics took place on 17–18 August at the Nanjing Olympic Sports Centre in Nanjing, China.
The boys' 100 metre backstroke event in swimming at the 2014 Summer Youth Olympics took place on 17 and 18 August at the Nanjing Olympic Sports Centre in Nanjing, China.
The boys' 50 metre backstroke event in swimming at the 2014 Summer Youth Olympics took place on 19 and 20 August at the Nanjing Olympic Sports Centre in Nanjing, China.
The girls' 50 metre backstroke event in swimming at the 2014 Summer Youth Olympics took place on 20–21 August at the Nanjing Olympic Sports Centre in Nanjing, China.
Evgeny Mikhailovich Rylov is a Russian competitive swimmer and Olympic champion specializing in backstroke events. He won three gold medals at the 2014 Summer Youth Olympics in Nanjing, and a bronze medal at his senior international debut at the 2015 World Championships in Kazan. He also won a bronze medal at the 2016 Summer Olympics in Rio de Janeiro and a gold medal at the 2017 World Championships in Budapest, both were in the 200 metre backstroke event. In 2018, at the 2018 World Short Course Championships, he won gold medals in the 200 metre backstroke and 50 metre backstroke. At the 2019 World Championships, he won a gold medal in the 200 metre backstroke, silver medal in the 100 metre backstroke, and silver medal in the 50 metre backstroke. He won the gold medal in the 100 metre backstroke and 200 metre backstroke at the 2020 Summer Olympics in Tokyo.
Corey Charles Garth Main is a New Zealand swimmer who qualified to compete at the 2016 Summer Olympics to be held in Rio de Janeiro, Brazil, in the men's 100 metre backstroke.
Kristóf Milák is a Hungarian swimmer. He is the current holder of the world record in the long course 200 metre butterfly and the European record in the long course 100 metre butterfly. He also currently holds the Hungarian record in the short course 50 metre backstroke. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal in the 200 metre butterfly and a silver medal in the 100 metre butterfly. He has also won three gold medals and one silver at the World Aquatic Championships, as well as three gold medals at the European Aquatics Championships. He was the gold medalist in the 400 metre freestyle, 200 metre freestyle, and 200 metre butterfly events at the 2018 Summer Youth Olympics.
The boys' 100 metre backstroke event at the 2018 Summer Youth Olympics took place on 7 and 8 October at the Natatorium in Buenos Aires, Argentina.
The girls' 100 metre backstroke event at the 2018 Summer Youth Olympics took place on 7 and 8 October at the Natatorium in Buenos Aires, Argentina.
The boys' 100 metre butterfly event at the 2018 Summer Youth Olympics took place on 8 and 9 October at the Natatorium in Buenos Aires, Argentina.
The boys' 50 metre butterfly event at the 2018 Summer Youth Olympics took place on 10 and 11 October at the Natatorium in Buenos Aires, Argentina.
The boys' 200 metre backstroke event at the 2018 Summer Youth Olympics took place on 12 October at the Natatorium in Buenos Aires, Argentina.
The boys' 50 metre freestyle event at the 2018 Summer Youth Olympics took place on 9 and 10 October at the Natatorium in Buenos Aires, Argentina.
The girls' 50 metre backstroke event at the 2018 Summer Youth Olympics took place on 10 and 11 October at the Natatorium in Buenos Aires, Argentina.
The boys' 50 metre breaststroke event at the 2018 Summer Youth Olympics took place on 11 and 12 October at the Natatorium in Buenos Aires, Argentina.
Swimming has featured as a sport at the European Youth Summer Olympic Festival since its first edition in 1991. It has appeared on the programme at every subsequent edition of the biennial multi-sport event for European athletes under the age of 18.
Srihari Nataraj is an Indian swimmer. He represented India at the 2019 World Aquatics Championships in Gwangju, South Korea. He qualified for Tokyo Summer Olympics after FINA approved his 'A' standard qualification time in men's 100m backstroke time trial at the Sette Colli Trophy in Rome.
Rhyan Elizabeth White is an American swimmer. She won a silver medal in the 4x100-meter medley relay at the 2020 Summer Olympics for her contribution in the prelims of the event and placed fourth in both the 100-meter backstroke and the 200-meter backstroke. At the 2020 Olympics, White also became the first Utah-born swimmer to compete in an Olympic Games. At the 2018 Summer Youth Olympics, she was the only swimmer representing the United States to win a medal. She won her first world title in the 200-meter backstroke at the 2021 World Short Course Championships.
