
Belarus competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. It was the nation's sixth consecutive appearance at the Summer Olympics in the post-Soviet era.

Mongolia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation made its debut in 1964, Mongolian athletes had appeared in every edition of the Summer Olympic Games, with the exception of the 1984 Summer Olympics in Los Angeles, because of its partial support to the Soviet boycott.

Armenia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. It was the nation's sixth consecutive appearance at the Summer Olympics in the post-Soviet era.
The 2016 Olympic Wrestling Pan American Qualification Tournament was the first regional qualifying tournament for the 2016 Olympics.
The 2016 Olympic Wrestling Asian Qualification Tournament was the second regional qualifying tournament for the 2016 Summer Olympics The competition was held from 18 to 20 March 2016 in Astana, Kazakhstan.
The 2016 Olympic Wrestling African & Oceania Qualification Tournament was the third regional qualifying tournament for the 2016 Olympics.
The 2016 Olympic Wrestling European Qualification Tournament was the fourth regional qualifying tournament for the 2016 Olympics. It was held between 15–17 April 2016 in Zrenjanin, Serbia.
The 2016 World Wrestling Olympic Qualification Tournament 2 was the second of two worldwide qualification tournaments for the 2016 Olympics. Competitors at this tournament failed to qualify for the Olympics at the 2015 World Wrestling Championships, at their respective regional qualifier, or at the 2016 World Wrestling Olympic Qualification Tournament 1. The top two competitors in each weight class qualified.
The 2016 World Wrestling Olympic Qualification Tournament 1 was the first of two worldwide qualification tournaments for the 2016 Olympics. Competitors at this tournament failed to qualify for the Olympics at the 2015 World Wrestling Championships or at their respective regional qualifier. The top three competitors in each weight class for the men and top two competitors for the women qualified.

Mimi Nikolova Hristova is a Bulgarian freestyle wrestler. She competed in the women's freestyle 58 kg event at the 2016 Summer Olympics, in which she was eliminated in the round of 32 by Pürevdorjiin Orkhon.

Turkey competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, due to the COVID-19 pandemic. Since the nation's official debut in 1908, Turkish athletes have appeared in every edition of the Summer Olympic Games, except the 1920 Summer Olympics in Antwerp, the 1932 Summer Olympics in Los Angeles at the period of worldwide Great Depression, and the 1980 Summer Olympics in Moscow because of its support for the United States-led boycott.

Ukraine competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, due to the worldwide COVID-19 pandemic. It was the nation's seventh consecutive appearance at the Summer Olympics in the post-Soviet era with its smallest representation ever.

Romania competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. Since the nation's participation started in 1900, Romanian athletes have appeared in every edition of the Summer Olympic Games, except for two occasions: the 1932 Summer Olympics in Los Angeles at the period of the worldwide Great Depression, and the 1948 Summer Olympics in London.

The 2020 Olympic Wrestling Pan American Qualification Tournament was the first regional qualifying tournament for the 2020 Summer Olympics. The event was held from 13 to 15 March 2020, in Ottawa, Canada.

Azerbaijan competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. It was the nation's seventh consecutive appearance at the Summer Olympics in the post-Soviet era.

Victor Ciobanu is a Moldovan Greco-Roman wrestler. He won the gold medal in the 60 kg event at the 2021 World Wrestling Championships held in Oslo, Norway. He is the first wrestler representing Moldova to win a gold medal in Greco-Roman wrestling at the World Wrestling Championships.

The 2021 African & Oceania Wrestling Olympic Qualification Tournament was the third regional qualifying tournament for the 2020 Summer Olympics. The event was held from 2 to 4 April 2021, in Hammamet, Tunisia.

The 2021 Asian Wrestling Olympic Qualification Tournament was the fourth and final regional qualifying tournament for the 2020 Summer Olympics. The event was held from 9 to 11 April 2021, in Almaty, Kazakhstan. The 2021 Asian Wrestling Championships were held at the same venue.

The 2021 World Wrestling Olympic Qualification Tournament was the last wrestling qualification tournament for the 2020 Summer Olympics in Tokyo, Japan. The event was held from 6 to 9 May 2021, in Sofia, Bulgaria.

Julián Stiven Horta Acevedo is a Colombian of Portuguese descent Greco-Roman wrestler. He won the 2020 Pan American Wrestling Olympic Qualification Tournament in the 67 kg category, thus qualifying for the 2020 Summer Olympics in Tokyo, Japan. He competed in the 67 kg event.