The women's 50 metre breaststroke event in swimming at the 2013 World Aquatics Championships took place on 3–4 August at the Palau Sant Jordi in Barcelona, Spain.
The Men's 50 metre freestyle competition at the 2019 World Championships was held on 26 and 27 July 2019. Caeleb Dressel finished first in the final, retaining the title he won in the previous Championships.
The Men's 100 metre freestyle competition at the 2019 World Championships was held on 24 and 25 July 2019.
The Men's 50 metre backstroke competition at the 2019 World Championships was held on 27 and 28 July 2019.
The Men's 100 metre backstroke competition at the 2019 World Championships was held on 22 and 23 July 2019. The defending champion was Xu Jiayu, and he successfully defended his title. Jiayu set a competition record in the semifinals by winning his semifinal in 52.17 seconds.
The Men's 50 metre breaststroke competition at the 2019 World Championships was held on 23 and 24 July 2019.
The Men's 100 metre breaststroke competition at the 2019 World Championships was held on 21 and 22 July 2019. Adam Peaty broke the world record with a time of 56.88 in the semi-final, the first man to swim under 57 seconds in this event, and went on to win in the final.
The Men's 200 metre breaststroke competition at the 2019 World Championships was held on 25 and 26 July 2019.
The Men's 100 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019. The defending champion Caeleb Dressel broke Michael Phelps' ten-year-old record by 0.32 second in the semi-final, setting a new world-record time of 49.50 seconds. Dressel won the final held the following day, defending his title.
The Men's 200 metre butterfly competition at the 2019 World Championships was held on 23 and 24 July 2019. The event was won by Kristóf Milák, who broke a 10-year-old record set by Michael Phelps, and set a new world-record time of 1:50.73 in the process.
The Women's 50 metre freestyle competition at the 2019 World Championships was held on 27 and 28 July 2019.
The Women's 200 metre freestyle competition at the 2019 World Championships was held on 23 and 24 July 2019.
The Women's 100 metre backstroke competition at the 2019 World Championships was held on 22 and 23 July 2019.
The Women's 200 metre backstroke competition at the 2019 World Championships was held on 26 and 27 July 2019.
The Women's 100 metre breaststroke competition at the 2019 World Championships was held on 22 and 23 July 2019.
The Women's 200 metre breaststroke competition at the 2019 World Championships was held on 25 and 26 July 2019.
The Women's 50 metre butterfly competition at the 2019 World Championships was held on 26 and 27 July 2019.
The Women's 100 metre butterfly competition at the 2019 World Championships was held on 21 and 22 July 2019.
The Women's 200 metre butterfly competition at the 2019 World Championships was held on 24 and 25 July 2019.
The Women's 200 metre individual medley competition at the 2019 World Championships was held on 21 and 22 July 2019.
