Swimming at the 2020 Summer Olympics – Men's 50 metre freestyle

The men's 50 metre freestyle event at the 2020 Summer Olympics was held from 30 July to 1 August 2021 at the Tokyo Aquatics Centre. It was the event's tenth appearance, first held in 1904 (as 50 yards) and then at every edition since 1988. The event is nicknamed the "splash and dash" event.

The winning margin was 0.48 seconds which as of 2023 is the only time this event has been won by more than 0.25 seconds at the Olympics.

Summary
U.S. swimmer Caeleb Dressel led from start to finish as he surged to an Olympic record time of 21.07, only 0.03 off his personal best time. By doing so, Dressel became the third male swimmer in history (joining Michael Phelps and Mark Spitz) to win three individual titles at a single Games.

At 0.48 seconds behind Dressel, Florent Manaudou claimed his second successive Olympic silver in this event following his triumph in 2012. Brazil's Bruno Fratus finished in 21.57 to win the bronze and his first career Olympic medal at the age of 32. Meanwhile, Dressel's teammate Michael Andrew narrowly missed the podium by two one-hundredths of a second.

Great Britain's Ben Proud and Greece's Kristian Gkolomeev came equal fifth in 21.72, while Lorenzo Zazzeri of Italy and Thom De Boer of the Netherlands rounded out the finalists.

The medals for competition were presented by Anant Singh, South African IOC member, and the gifts were presented by Husain Al-Musallam, FINA President.

Records
Prior to this competition, the existing world and Olympic records were as follows.

The following record was established during the competition:

Qualification
The Olympic Qualifying Time for the event is 22.01 seconds. Up to two swimmers per National Olympic Committee (NOC) can automatically qualify by swimming that time at an approved qualification event. The Olympic Selection Time is 22.67 seconds. Up to one swimmer per NOC meeting that time is eligible for selection, allocated by world ranking until the maximum quota for all swimming events is reached. NOCs without a male swimmer qualified in any event can also use their universality place.

Competition format
The competition consists of three rounds: heats, semifinals, and a final. The swimmers with the best 16 times in the heats advance to the semifinals. The swimmers with the best 8 times in the semifinals advance to the final. Swim-offs are used as necessary to break ties for advancement to the next round.

Schedule
All times are Japan Standard Time (UTC+9)

Heats
The swimmers with the top 16 times, regardless of heat, advanced to the semifinals.

Semifinals
The swimmers with the best 8 times, regardless of heat, advanced to the final.