The men's 50 metre breaststroke competition of the swimming events at the 2011 World Aquatics Championships was held on July 26 with the heats and the semifinals and July 27 with the final.
Vladimir Viktorovich Morozov is a Russian competitive swimmer and Olympic medalist. He is the former world record holder in the short course 100-metre individual medley, the current textile world record, World Cup record and Russian national record holder in the 100-metre individual medley and 100-metre freestyle, and Russian record holder in the 50-metre freestyle. He also holds the European record for the 100-metre individual medley. Formerly he held the Russian national record in the 50-metre backstroke and the 50-metre butterfly, and held the European and Russian records in the 50-metre breaststroke.
Nicolas Fink is an American competition swimmer who specializes in breaststroke events. He won three gold medals, two silver medals, and a bronze medal at the 2021 World Short Course Championships in relay and individual breaststroke events. At the 2020 Summer Olympics, he placed fifth in the 200 meter breaststroke. He won the silver medal in the 200 meter breaststroke at the 2014 Pan Pacific Championships, and a gold medal in the 4×100 meter medley relay and a silver medal in the 200 meter breaststroke at the 2019 Pan American Games. He currently represents the Cali Condors which is part of the International Swimming League.
Michael Charles Andrew is an American competitive swimmer and an Olympic gold medalist. He was the 2016 world champion in the 100 meter individual medley. At his first Olympic Games, the 2020 Summer Olympics, he won a gold medal and set a world record as part of the 4x100 meter medley relay, placed fourth in the 100 meter breaststroke, fourth in the 50 meter freestyle, and fifth in the 200 meter individual medley. Andrew's swims in 2021 at the 2020 Olympics made him the first swimmer to represent the United States at an Olympic Games in an individual breaststroke event as well as another individual event other than an individual medley in the then-125-year-history of swimming at the Summer Olympics. He has won 76 medals at Swimming World Cup circuits.
Ilya Syarheyevich Shymanovich is a Belarusian swimmer. He is the world record holder in the short course 100 metre breaststroke and a former world record holder in the short course 50 metre breaststroke. At the 2018 World Championships he won two silver medals, one each in the 100 metre breaststroke and the 50 metre breaststroke. He won two gold medals, one in the 50 metre breaststroke and one in the 200 metre breaststroke, and a silver medal, in the 100 metre breaststroke, at the 2021 European Short Course Championships. At the 2021 World Short Course Championships he won the gold medal in the 100 metre breaststroke.
Nicolò Martinenghi is an Italian swimmer. He is a two-time world record holder in the 4×50 metre medley relay, swimming breaststroke on both relays. He is the Italian record holder in the 50 metre breaststroke and 100 metre breaststroke.
Niamh Coyne is an Irish swimmer. She competed in the women's 50 metre breaststroke at the 2019 World Aquatics Championships held in Gwangju, South Korea and she did not advance to compete in the semi-finals.
Michele Lamberti is a competitive Italian swimmer. He is a former world record holder in the short course 4×50-metre medley relay. He currently holds the Italian record in the short course 50-metre backstroke. At the 2021 European Short Course Championships he won a gold medal and set a world record in the 4×50-metre medley relay, won three silver medals, one in the 50-metre backstroke, one in the 100-metre butterfly, and one in the 4×50-metre mixed medley relay, and won a bronze medal in the 200-metre backstroke. At the 2021 World Short Course Championships he won two bronze medals in relay events, swimming in the preliminaries for each relay.
Sergey Geybel is a competitive Russian swimmer specializing in breaststroke events. He is a former world record holder in the 4×100-metre medley relay and the 4×50-metre medley relay. He won a gold medal at the 2008 World Short Course Championships as part of the world-record-setting finals relay team in the 4×100-metre medley relay. He also won two silver medals and one bronze medal over the course of his career in the 4×50-metre medley relay at the European Short Course Championships.
Simone Cerasuolo is an Italian competitive swimmer. He is the world junior record holder in the short course 50 metre and 100 metre breaststroke events. In the 50 metre breaststroke, he won a gold medal at the 2021 European Junior Championships, the silver medal at the 2022 European Aquatics Championships, the bronze medal at the 2022 World Short Course Championships, and placed fifth at the 2022 World Aquatics Championships. In the 100 metre breaststroke, he won the bronze medal at the 2021 European Junior Championships and placed sixth in the final at the 2022 World Short Course Championships.
The Women's 50 metre breaststroke competition of the 2021 FINA World Swimming Championships was held on 16 and 17 December 2021.
Kirill Strelnikov is a Russian competitive swimmer. He won a gold medal in the 4×50 metre medley relay at the 2021 World Short Course Championships and the 4×100 metre medley relay at the 2013 World University Games, swimming the breaststroke leg of both relays in the final. At the 2021 European Short Course Championships he won a bronze medal in the 4×50 metre mixed medley relay, swimming the breaststroke leg of the relay in the prelims heats.
Florine Gaspard is a Belgian competitive swimmer specializing in sprint breaststroke events. She is the Belgian record holder in the long course and short course 50-metre breaststroke. She placed sixth in the final of the 50-metre breaststroke at the 2021 European Short Course Championships. At the 2022 European Aquatics Championships, she placed eighth in the final of the 50-metre breaststroke. At the World Short Course Championships, she placed eleventh in the semifinals of the 50-metre breaststroke in 2021 and 2022.
The Men's 50 metre butterfly competition of the 2022 FINA World Swimming Championships was held on 13 and 14 December 2022.
The Men's 50 metre backstroke competition of the 2022 FINA World Swimming Championships was held on 15 and 16 December 2022.
The Women's 50 metre breaststroke competition of the 2022 FINA World Swimming Championships was held on 17 and 18 December 2022.
The Women's 100 metre butterfly competition of the 2022 FINA World Swimming Championships was held on 17 and 18 December 2022.
