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 have been 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.[
Swimming featured a record total of 37 events 18 for each gender and 1 mixed, with the addition of the men`s 800 m freestyle, women`s 1500 m freestyle, and the mixed 4 × 100 m medley relay.