Norway competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's twenty-fourth appearance at the Summer Olympics, except for the 1904 Summer Olympics in St. Louis, and the 1980 Summer Olympics in Moscow, due to the country's support of the United States boycott. With the absence of women's football and handball teams, Norwegian Olympic and Paralympic Committee and Confederation of Sports sent the nation's smallest delegation to the Games since the 1968 Summer Olympics in Mexico City. A total of 53 athletes, 36 men and 17 women, competed only in 12 different sports. There was only a single competitor in badminton, swimming, taekwondo, weightlifting, and wrestling.
The United States competed at the 1964 Summer Olympics in Tokyo, Japan. 346 competitors, 267 men and 79 women, took part in 159 events in 19 sports.
Russia participated at the 2010 Summer Youth Olympics in Singapore. The Russian team consisted of 96 athletes competing in 20 sports: aquatics (swimming), archery, athletics, basketball, boxing, canoeing, fencing, gymnastics, handball, judo, modern pentathlon, rowing, sailing, shooting, table tennis, taekwondo, tennis, volleyball, weightlifting and wrestling. Viktoria Komova won most medals, with 3 gold medals and 1 bronze medal.
Singapore was the host of the inaugural 2010 Summer Youth Olympics. It participated in all the 26 sports, with a total of 129 athletes representing the nation.
Turkey competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This nation has competed at every Summer Olympic Games in the modern era since its debut in 1908. Turkey, however, did not attend 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 boycott. The Turkish Olympic Committee sent the nation's largest delegation to the Games. A total of 114 athletes, 48 men and 66 women, competed in 16 sports. For the first time in its Olympic history, Turkey was represented by more female than male athletes. Women's basketball and women's volleyball were the only team-based sports in which Turkey had its representation in these Olympic games. There was only a single competitor in archery, badminton, and artistic gymnastics.
The People's Republic of China, the previous host of the 2008 Olympics at Beijing, competed at the 2012 Summer Olympics in London, the United Kingdom, between 27 July and 12 August 2012. This was the nation's ninth appearance at the Summer Olympics since its debut in 1952. A total of 396 Chinese athletes, 171 men and 225 women, were selected by the Chinese Olympic Committee to compete in 23 sports. For the fourth time in its Olympic history, China was represented by more female than male athletes.
The United States of America (USA), represented by the United States Olympic Committee (USOC), competed at the 2012 Summer Olympics in London, from July 27 to August 12, 2012. U.S. athletes have competed at every Summer Olympic Games in the modern era, except the 1980 Summer Olympics in Moscow which they boycotted in protest of the Soviet invasion of Afghanistan. The USOC sent a total of 530 athletes to the Games, 262 men and 268 women, to compete in 25 sports. For the first time in its Olympic history, the United States was represented by more female than male athletes.
The United States competed at the 2012 Winter Youth Olympics in Innsbruck, Austria.
South Korea competed at the 2012 Summer Olympics in London, from July 27 to August 12, 2012. This was the nation's sixteenth appearance at the Olympics, having missed the 1980 Summer Olympics in Moscow because of its support for the United States boycott. The Korean Olympic Committee sent the nation's smallest delegation to the Games since 1992. A total of 248 athletes, 135 men and 113 women, competed in 22 sports.
Serbia competed at the 2012 Summer Olympics in London. This was the nation's third appearance at the Summer Olympics.
Egypt competed at the 2014 Summer Youth Olympics, in Nanjing, China from 16 August to 28 August 2014.
Russia competed at the 2014 Summer Youth Olympics, in Nanjing, China from 16 August to 28 August 2014.
The United States competed at the 2014 Summer Youth Olympics, in Nanjing, China from 16 August to 28 August 2014. 92 athletes across 19 sports participated.
The United States of America (USA), the previous host of the 1996 Olympics at Atlanta, competed at the 2000 Summer Olympics in Sydney, Australia. 586 competitors, 333 men and 253 women, took part in 265 events in 31 sports.
Brazil competes at the 2014 Summer Youth Olympics, in Nanjing, China from 16 August to 28 August 2014.
Canada competed at the 2014 Summer Youth Olympics, in Nanjing, China from 16 August to 28 August 2014. Field hockey Olympian Sandra Levy was chosen to be the nation's chef de mission. The Canadian team consists of 75 athletes in 19 sports.
The United States of America (USA), represented by the United States Olympic Committee (USOC), competed at the 2016 Summer Olympics in Rio de Janeiro, from August 5 to 21, 2016. U.S. athletes have appeared in every Summer Olympic Games of the modern era, with the exception of the 1980 Summer Olympics in Moscow, which they boycotted in protest of the Soviet invasion of Afghanistan. For the second consecutive time in the Summer Olympics, the United States was represented by more female than male athletes.
Russia competed at the 2018 Summer Youth Olympics, in Buenos Aires, Argentina from 6 to 18 October 2018. A total of 93 athletes competed in 24 sports. There were no Russian athletes in badminton, canoeing, equestrian, field hockey, golf, roller speed skating, rowing, rugby sevens and weightlifting.
Canada competed at the 2018 Summer Youth Olympics, in Buenos Aires, Argentina from October 6th to 18th.
The United States of America (USA), represented by the United States Olympic & Paralympic Committee (USOPC), competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place in the summer of 2020, the Games were postponed to July 23 to August 8, 2021, due to the COVID-19 pandemic. U.S. athletes have appeared in every Summer Olympic Games of the modern era, with the exception of the 1980 Summer Olympics in Moscow, which the U.S. boycotted in protest of the Soviet invasion of Afghanistan. The opening ceremony flag-bearers for the United States were baseball player Eddy Alvarez and basketball player Sue Bird. Javelin thrower Kara Winger was the flag-bearer for the closing ceremony. For the third consecutive time in the Summer Olympics, the United States was represented by more female than male athletes.
