Tuvalu participates in the Olympic Games in the Summer Olympics. They have yet to compete at the Winter Olympics.
Rheed McCracken is an Australian Paralympic athletics competitor. He named the 2012 Junior Athlete of the Year as part of the Australian Paralympian of the Year Awards. He represented Australia at the 2012 London Paralympics, 2016 Rio Paralympics and 2020 Tokyo Paralympics, where he won three silver and two bronze medals.
Michael Roeger is an Australian T46 athletics competitor. He competed at the 2008, 2012, and 2016 and 2020 Summer Paralympics athletics in middle distance and marathon running events. He has won one gold and three bronze medals at the IPC Athletics World Championships and a bronze medal at the 2016 Rio Paralympics. His gold in the Men's T46 marathon at the 2019 World Para Athletics Championships was held as part of the London Marathon, set a new world record. Roeger competed at the 2020 Tokyo Paralympics in the marathon.
Sibusiso Bruno Matsenjwa is a sprinter from Eswatini. He competed in the 200 metres at the 2012 and 2016 Olympics, but failed to reach the finals. He broke the national record on both occasions and served as the flag bearer for Eswatini during the opening ceremony in 2016. Matsenjwa holds national records over 100–400 m distances. He represented his country at three outdoor and three indoor world championships. Sibusiso also competed at the 2018 Gold Coast Commonwealth Games.
Anaso Jobodwana is a South African sprinter. He competed in 200 metres at the 2012 Summer Olympics in London where he ran a new personal best of 20.27 seconds to reach the final.
Olivier Irabaruta is a Burundian long-distance runner. At the 2012 Summer Olympics, he competed in the Men's 5000 metres, finishing 29th overall in Round 1, failing to qualify for the final.
Akani Simbine is a South African sprinter specialising in the 100 metres event. He was fifth at the 2016 Summer Olympics in the men's 100 metres and was the 100 metres African record holder with a time of 9.84 seconds set in July 2021 until broken by Ferdinand Omanyala in September 2021.
The Refugee Olympic Team competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016, as independent Olympic participants.
Joaquim Lobo is a Mozambican canoeist. He competed in the men's C-1 200 metres event and the men's C-2 1000 metres event at the 2016 Summer Olympics. He did not qualify for the semifinals in the men's C-1 200m event. Along with partner Mussa Chamaune, he finished in 11th place in the C-2 1000m event. Lobo was the flag bearer for Mozambique during the Parade of Nations. In June 2021, he qualified to represent Mozambique at the 2020 Summer Olympics.
Ángela Melania Castro Chirivechz is a Bolivian race walker. She competed in the women's 20 kilometres walk event at the 2016 Summer Olympics finishing in 18th place. It was the best result ever for Bolivia in Olympic athletics. She was the flag bearer for Bolivia during both the opening ceremony and closing ceremony.
Jorge Henrique da Costa Vides is a Brazilian track and field sprinter who competes in the 100 metres and 200 metres. He represented his country at the 2016 Summer Olympics. He holds a 200 m personal best of 20.34 seconds.
Didier Kiki is a Beninese Olympic sprinter.
Clarence Munyai is a South African sprinter. He is the current South African record holder in the 200 metres, with a time of 19.69, set on 16 March 2018 at the South African national championships. He is ranked 10th in the world for 200 metres and 12th for the 300 metres. He competed in the men's 200 metres at the 2016 Summer Olympics. He finished 3rd in his heat with a time of 20.66 seconds and did not qualify for the semifinals.
Ned Justeen Azemia is a Seychellois hurdler who specialises in the 400 metres hurdles. He is the current Seychellois record holder in the event. Azemia competed in the 2016 Summer Olympics in Rio de Janeiro in the 400 metres hurdles. He has also competed in two World Junior Championships, an African athletics championships and an African Youth Games. Azemia has also raced over the flat 400 metres distance.
Jhon Alejandro Perlaza Zapata is a Colombian sprinter. He competed in the men's 4 × 400 metres relay at the 2016 Summer Olympics. He competed at the 2020 Summer Olympics.
Santiago Grassi is an Argentine swimmer. He competed at the 2016 Summer Olympics in the men's 100 metre butterfly; his time of 52.56 seconds in the heats did not qualify him for the semifinals. He represented Argentina again at the 2020 Summer Olympics in the men's 100 metre butterfly event.
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 Maldives competed at the 2020 Summer Olympics in Tokyo which were held from 23 July to 8 August 2021. Originally scheduled to take place from 24 July to 9 August 2020, the event was postponed due to the COVID-19 pandemic. This was the nation's ninth appearance at the Summer Olympics since its debut in 1988. The delegation consisted of four athletes, two men and two women, competing in four events across three sports. Two athletes participated in the swimming tournament: Mubal Azzam Ibrahim and Aishath Sajina. Athlete Hassan Saaid, a returning competitor from the 2016 Rio Olympics competed in the men's 100 m. Fathimath Nabaaha Abdul Razzaq was the first badminton player the Maldives entered into the Olympic tournament since the 2012 London Olympics. For the first time, in an effort to promote gender equality, two flagbearers, one male and one female were allowed at the Olympics. Nabaaha and Mubal lead the Maldivian squad as the flagbearers in the opening ceremony. The Maldives, however, has yet to win its first ever Olympic medal.
Mauritania competed at the 2020 Summer Olympics in Tokyo which were held from 23 July to 8 August 2021. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed due to the COVID-19 pandemic. It was the nation's tenth appearance at the Summer Olympics since its debut in 1984. The delegation consisted of two athletes, one man and one woman, competing in two athletic events. Sprinters Abidine Abidine and Houlèye Ba represented Mauritania in the men's 5000 metres and women's 800 metres event, respectively. For the first time, in an effort to promote gender equality, two flagbearers, one male and one female were allowed at the Olympics. Abidine and Houlèye lead the Mauritanian squad as the flagbearers in the opening ceremony. As of 2023, Mauritania, however, has yet to win its first ever Olympic medal.
South Africa 
