For the athletics at the 2020 Summer Olympics competitions, the following qualification systems were in place. Qualification ended on 29 June 2021, but for marathon and 50 km race walking, it ended on 31 May 2021. Some 1900 athletes, from 196 countries, competed. 103 countries qualified also through Universality places.
The men's 100 metres event at the 2020 Summer Olympics took place on 31 July and 1 August 2021 at the Olympic Stadium. 84 athletes were expected to compete; 27 nations used universality places to enter athletes in addition to the 56 qualifying through standard time or ranking. 78 athletes from 59 nations competed. Marcell Jacobs won the gold medal, establishing twice, semifinal and final, the new European record, as well as collecting Italy's first medal in the men's 100 metres. The United States extended its podium streak in the event to six Games with Fred Kerley's silver - after he placed only third at the U.S. trials. Canadian Andre De Grasse won his second consecutive bronze medal in the 100 metres, while running a personal best. With Usain Bolt retired, Jamaica's three Games gold medal streak ended.
The men's 200 metres event at the 2020 Summer Olympics took place on 3 and 4 August 2021 at the Olympic Stadium. 48 athletes from 33 nations competed, including five universality places. Canada earned its first gold medal in the event since 1928 and third overall, as Andre De Grasse added gold to his 2016 silver to become the 12th man to earn multiple medals in the 200 metres. Kenneth Bednarek and Noah Lyles, both of the United States, took silver and bronze as Americans reached the podium for the first time since 2008. Jamaica's three-Games gold medal streak in the event ended, with Usain Bolt having retired.
The men's 400 metres event at the 2020 Summer Olympics took place between 1 and 5 August 2021 at the Olympic Stadium. Approximately fifty athletes were expected to compete; the exact number was dependent on how many nations use universality places to enter athletes in addition to the 48 qualifying through time or ranking. 48 athletes from 33 nations competed. The event was won by 0.23 seconds by Steven Gardiner of the Bahamas, with Anthony Zambrano of Colombia taking silver. Those were the first medals in the men's 400 metres for each of those two nations. Kirani James of Grenada won his third consecutive medal in the event with his bronze, making him the first man to earn three medals in the 400 metres.
The men's 1500 metres event at the 2020 Summer Olympics took place between 3 and 7 August 2021 at the Japan National Stadium. Approximately fifty athletes were expected to compete; the exact number depended on how many nations used universality places to enter athletes in addition to the 45 qualifying through time or ranking. 47 competitors from 27 nations competed. Jakob Ingebrigtsen set a new Olympic record on his way to the gold medal, Norway's first medal in the men's 1500 metres. Timothy Cheruiyot of Kenya took silver, returning that nation to the podium for the first time since a four-Games medal streak ended in 2008. Josh Kerr earned bronze, Great Britain's first medal in the event since 1988.
The men's 5000 metres event at the 2020 Summer Olympics took place on 3 and 6 August 2021 at the Japan National Stadium. Approximately 45 athletes competed; the exact number was dependent on how many nations use universality places to enter athletes in addition to the 42 qualifying through time or ranking. The winning margin was 0.46 seconds.
The women's 5000 metres event at the 2020 Summer Olympics took place on 30 July and 2 August 2021 at the Japan National Stadium. Approximately 45 athletes competed; the exact number was dependent on how many nations use universality places to enter athletes in addition to the 42 qualifying through time or ranking.
The men's 10,000 metres event at the 2020 Summer Olympics took place on 30 July 2021 at the Japan National Stadium. 25 athletes competed. None of the 2016 medalists took part in the competition. Selemon Barega from Ethiopia won the event by 0.41 seconds, with Ugandans Joshua Cheptegei, the world record holder, and Jacob Kiplimo coming second and third, respectively. All of them won their first Olympic medal.
The men's 110 metres hurdles event at the 2020 Summer Olympics took place between 3 and 5 August 2021 at the Olympic Stadium. Approximately forty athletes were expected to compete; the exact number was dependent on how many nations used universality places to enter athletes in addition to the 40 qualifying through time or ranking. 40 athletes from 29 nations competed. Hansle Parchment of Jamaica won the gold medal, the nation's second consecutive victory in the event. His countryman Ronald Levy took bronze. American Grant Holloway earned silver, placing the United States back on the podium in the event after the nation missed the medals for the first time in Rio 2016.
The men's 3000 metres steeplechase event at the 2020 Summer Olympics took place on 30 July and 2 August 2021 at the Japan National Stadium. 45 athletes competed.
The men's marathon event at the 2020 Summer Olympics started at 07:00 on 8 August 2021 in Sapporo, Japan. 106 athletes from 46 nations competed. The previous Olympic champion, Kenyan Eliud Kipchoge, successfully defended his title, with Dutch and Belgian athletes Abdi Nageeye and Bashir Abdi gaining silver and bronze, respectively. Kipchoge was the third man to repeat as Olympic marathon champion, after Abebe Bikila and Waldemar Cierpinski. The Netherlands and Belgium earned their first men's marathon medals since 1980 and 1976, respectively.
The women's marathon event at the 2020 Summer Olympics started at 06:00 on 7 August 2021 in Sapporo. Peres Jepchirchir of Kenya won gold in 2:27:20 followed by world record holder and Kenyan teammate Brigid Kosgei with silver, and American Molly Seidel winning the bronze medal in her third-ever marathon.
The women's 20 kilometres walk event at the 2020 Summer Olympics took place on 6 August 2021 in Sapporo. Approximately 60 athletes has qualified; the exact number depended on how many nations use universality places to enter athletes in addition to the number qualifying through time. The actual number of participants was 58 walkers, and the winner was Antonella Palmisano of Italy.
The men's 50 kilometres walk event at the 2020 Summer Olympics took place on 6 August 2021 in Sapporo. 59 athletes competed; the exact number was dependent on how many nations use universality places to enter athletes in addition to the number qualifying through time.
The men's pole vault event at the 2020 Summer Olympics took place between 31 July and 3 August 2021 at the Japan National Stadium. 29 athletes from 18 nations competed. Armand Duplantis of Sweden won gold, with Christopher Nilsen of the United States earning silver and Thiago Braz of Brazil taking bronze. It was Sweden's first victory in the event and first medal of any color in the men's pole vault since 1952. Braz, who had won in 2016, became the ninth man to earn multiple medals in the pole vault.
The men's discus throw event at the 2020 Summer Olympics took place between 30 and 31 July 2021 at the Japan National Stadium. Approximately 35 athletes were expected to compete; the exact number depended on how many nations use universality places to enter athletes in addition to the 32 qualifying through distance or ranking. 32 athletes from 24 nations competed. Daniel Ståhl of Sweden won gold, with his countryman Simon Pettersson earning silver. It was the first victory in the event for Sweden and the first men's discus throw medal of any color for the nation since 1972. Lukas Weißhaidinger took Austria's first-ever Olympic in the men's discus with his bronze.
The men's hammer throw event at the 2020 Summer Olympics took place between 2 and 4 August 2021 at the Japan National Stadium. Approximately 35 athletes were expected to compete; the exact number was dependent on how many nations used universality places to enter athletes in addition to the 32 qualifying through distance or ranking. 31 athletes from 21 nations competed. Wojciech Nowicki of Poland won the gold medal, adding to his 2016 bronze to become the 15th man to earn multiple hammer throw medals. It was Poland's second gold medal in the event, after Szymon Ziółkowski's 2000 victory. Nowicki's countryman Paweł Fajdek took bronze. Between them was Norwegian thrower Eivind Henriksen, with his silver being Norway's first-ever Olympic medal in the men's hammer.
The men's javelin throw event at the 2020 Summer Olympics took place on 4 and 7 August 2021 at the Japan National Stadium. Approximately 35 athletes competed; the exact number depended on how many nations use universality places to enter athletes in addition to the 32 qualifying through distance or ranking.
The women's javelin throw event at the 2020 Summer Olympics took place on 3 and 6 August 2021 at the Japan National Stadium. Approximately 35 athletes competed; the exact number was dependent on how many nations use universality places to enter athletes in addition to the 32 qualifying through distance or ranking.
The men's decathlon event at the 2020 Summer Olympics took place on 4 and 5 August 2021 at the Japan National Stadium. 23 athletes competed.
