
Athletics at the 2016 Summer Olympics were held during the last 10 days of the games, from 12–21 August 2016, at the Olympic Stadium. The sport of athletics at the 2016 Summer Olympics was made into three distinct sets of events: track and field events, road running events, and racewalking events.

The men's 4 × 100 metres relay competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Estádio Olímpico João Havelange on 18–19 August.

The men's 4 × 400 metres relay competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Estádio Olímpico João Havelange on 19–20 August.

The men's 10,000 metres event at the 2016 Summer Olympics took place on 13 August at the Olympic Stadium. In a tactical yet comparatively quick race, Great Britain's Mo Farah defended his Olympic title in 27:05.17 minutes, becoming the sixth man to win the Olympic 10,000 metres title twice. Reaching their first Olympic podium, Kenya's Paul Tanui was the silver medallist and Tamirat Tola of Ethiopia took the bronze.

The men's 50 kilometres race walk at the 2016 Olympic Games in Rio de Janeiro was held on 19 August. Matej Tóth, winner of the 2015 World Championships from Slovakia won the gold medal, reigning Olympic champion Jared Tallent from Australia finished second and Japanese walker Hirooki Arai took the bronze. The winning time was 3:40:58.

The men's 100 metres event at the 2016 Summer Olympics took place between 13–14 August at the Olympic Stadium. Eighty-four athletes from 57 nations competed.

The men's 110 metres hurdles event at the 2016 Summer Olympics took place between 15–16 August at the Olympic Stadium. Forty athletes from 27 nations competed. The event was won by Omar McLeod of Jamaica, the nation's first gold medal and second medal overall in the event. Orlando Ortega's silver was Spain's first medal in the men's high hurdles; Dimitri Bascou's bronze was France's first medal in the event since 1976. For the first time, American hurdlers contested the event but did not make the podium; the only time before that the United States did not win a 110 metres hurdles medal was the boycotted 1980 Games.

The men's 200 metres event at the 2016 Summer Olympics took place between 16–18 August in Rio de Janeiro, Brazil, at the Estádio Olímpico João Havelange. There were 77 competitors from 48 nations. The event was won by Usain Bolt of Jamaica, his third consecutive gold medal in the event. Bolt earned his eighth overall gold, needing only the 4x100 metres relay the next day to complete the sprint triple-triple. It was Jamaica's fourth victory in the event, second-most among nations. Andre De Grasse earned Canada's first medal in the event since 1928 with his silver; Christophe Lemaitre's bronze was France's first since 1960. The United States missed the podium for only the fifth time in the history of the men's 200 metres; it was the first time that it had done so in consecutive Games.

The men's 400 metres event at the 2016 Summer Olympics took place between 12 and 14 August at the Olympic Stadium. Fifty-three athletes from 35 nations competed. The event was won by Wayde van Niekerk of South Africa, the nation's second gold medal in the men's 400 metres. Kirani James of Grenada and LaShawn Merritt of the United States became the sixth and seventh men to win two medals in the event, but Michael Johnson remained the only man with two gold medals.

The men's 400 metres hurdles event at the 2016 Summer Olympics took place between 15–18 August at the Olympic Stadium. There were 47 competitors from 33 nations. The event was won by Kerron Clement of the United States, the nation's 19th victory in the men's long hurdles. Clement was the ninth man to win multiple medals in the event. Both Kenya and Turkey earned their first medals in the men's 400 metres hurdles, the former with Boniface Mucheru Tumuti's silver and the latter with Yasmani Copello's bronze.

The men's 800 metres event at the 2016 Summer Olympics took place between 12–15 August at the Olympic Stadium. Fifty-eight athletes from 39 nations competed. The event was won by David Rudisha of Kenya, the fourth man to successfully defend Olympic gold in the 800 metres. Taoufik Makhloufi of Algeria took silver, the first medal for the nation in the 800 metres since 2000. The United States had an even longer medal-less streak broken, as Clayton Murphy's bronze was their first since 1992.

The men's 1500 metres event at the 2016 Summer Olympics took place between 16–20 August at the Olympic Stadium in Rio de Janeiro, Brazil. Forty-two athletes from 26 nations competed. The event was won by Matthew Centrowitz, Jr. of the United States, the nation's first title in the event since 1908 and third overall. Taoufik Makhloufi and Nick Willis became the seventh and eighth men to win a second medal in the event, with Willis the only one to do so in non-consecutive Games.

The men's 5000 metres event at the 2016 Summer Olympics took place between 16–20 August at the Olympic Stadium.

The men's decathlon competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil. The event was held at the Olympic Stadium between 17–18 August.

The men's hammer throw was a competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil. The event was held at the Estádio Olímpico João Havelange between 17–19 August. There were 32 competitors from 24 nations. The event was won by Dilshod Nazarov of Tajikistan, the nation's first medal in the men's hammer throw and first gold medal in any Olympic event. Ivan Tsikhan of Belarus took silver, the 14th man to win multiple medals in the event in adding to his 2008 bronze. Bronze went to Wojciech Nowicki of Poland, the nation's first medal in the event since 2000.

The men's high jump competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Olympic Stadium between 14–16 August. Forty-four athletes from 28 nations competed. The event was won by Derek Drouin of Canada, the nation's first victory in the men's high jump since 1932. Drouin was the ninth man to win multiple medals in the high jump, after his 2012 bronze. Mutaz Essa Barshim, who had tied Drouin for bronze in 2012, was the tenth multiple medalist in the event. Barshim's silver was Qatar's fifth Olympic medal in any event, and the first better than bronze. Bohdan Bondarenko took bronze, Ukraine's first medal in the men's high jump.

The men's long jump competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Olympic Stadium between 12–13 August. Thirty-two athletes from 23 nations competed. The event was won by Jeff Henderson of the United States, the nation's first gold medal in the event since 2004 and 22nd overall. Luvo Manyonga won South Africa's second silver medal in the men's long jump. Defending champion Greg Rutherford of Great Britain took bronze, becoming the tenth man to win a second medal in the event.

The men's marathon at the 2016 Olympic Games in Rio de Janeiro took place on the Sambódromo on 21 August, the final day of the Games. One hundred fifty-five athletes from 79 nations competed. The event was won by Eliud Kipchoge of Kenya, the nation's second victory in the event in three Games. Feyisa Lilesa of Ethiopia took silver, while Galen Rupp of the United States took bronze.

The men's shot put competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil. The event was held at the Olympic Stadium on 18 August. Thirty-four athletes from 24 nations competed. The event was won by Ryan Crouser of the United States, the nation's first victory in the event since 2004. His teammate Joe Kovacs took silver. Tomas Walsh earned New Zealand's first medal in the men's shot put.

The men's 3000 metres steeplechase competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Olympic Stadium between 15–17 August.

The women's 4 × 100 metres relay competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Estádio Olímpico João Havelange on 18–19 August.

The women's 4 × 400 metres relay competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Estádio Olímpico João Havelange on 19–20 August.

The women's 10,000 metres event at the 2016 Summer Olympics took place on 12 August at the Olympic Stadium. The gold medal was won by Ethiopian Almaz Ayana—in only her second 10,000 m race on the track—in a world record time of 29 minutes, 17.45 seconds. London 2012 bronze medallist Vivian Cheruiyot won silver for Kenya, with reigning Olympic champion Tirunesh Dibaba of Ethiopia taking bronze.

The women's 100 metres event at the 2016 Summer Olympics took place between 12–13 August at the Olympic Stadium.

The women's 100 metres hurdles event at the 2016 Summer Olympics took place between 16–17 August at the Olympic Stadium.

The women's 200 metres competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil. The event was held at the Olympic Stadium between 15–17 August.

The women's 400 metres hurdles competition at the 2016 Summer Olympics in Rio de Janeiro, Brazil was held at the Olympic Stadium between 15–18 August.

The women's 400 metres event at the 2016 Summer Olympics took place between 13–15 August at the Olympic Stadium.

The women's 800 metres event at the 2016 Summer Olympics took place between 17–20 August at the Olympic Stadium.

The women's 1500 metres event at the 2016 Summer Olympics took place between 12–16 August at the Olympic Stadium.

The women's 5000 metres event at the 2016 Summer Olympics took place between 16–19 August at the Olympic Stadium.

The women's marathon event at the 2016 Summer Olympics took place on 14 August on the Sambadrome.