Poland competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eighteenth appearance at the Summer Olympics, except the 1984 Summer Olympics in Los Angeles, because of the Soviet boycott. The Polish Olympic Committee sent a total of 194 athletes to the Games, 132 men and 62 women, to compete in 21 sports. Men's volleyball was the only team-based sport in which Poland had its representation in these Olympic Games. There was only a single competitor in women's taekwondo.
Bulgaria competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's seventeenth appearance at the Summer Olympics, except for three occasions, including the 1948 Summer Olympics in London due to the nation's role in World War II and 1984 Summer Olympics in Los Angeles because of the Soviet boycott. The Bulgarian Olympic Committee sent 95 athletes, 49 men and 46 women, to compete in 19 sports. Shooting champion and four-time Olympian Mariya Grozdeva became the nation's first ever female flag bearer in the opening ceremony.
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.
Belgium competed at the 2004 Summer Olympics in Athens, Greece. 50 competitors, 31 men and 19 women, took part in 41 events in 14 sports.
Slovakia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's third consecutive appearance at the Summer Olympics since the post-Czechoslovak era. The Slovak Olympic Committee sent a total of 64 athletes to the Games, 48 men and 16 women, to compete in 11 sports. There was only a single competitor in artistic and trampoline gymnastics and sailing.
Switzerland competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Swiss athletes competed at every Summer Olympic Games in the modern era, except when they boycotted the 1956 Summer Olympics in Melbourne as a protest to the Soviet invasion of Hungary. The Swiss Olympic Association sent a total of 98 athletes to the Games, 59 men and 39 women, to compete in 18 sports.
The Czech Republic competed at the 1996 Summer Olympics in Atlanta, United States. It was the first Summer Games since the dissolution of Czechoslovakia, and so the Czech Republic and Slovakia competed as independent teams. 115 competitors, 76 men and 39 women, took part in 110 events in 17 sports.
South Africa competed at the 2008 Summer Olympics in Beijing, People's Republic of China. The team included 136 athletes, as of 10 July 2008. South Africa had its worst medals performance at an Olympics since 1994, and tied its performance in the 1936 Games.
Austria sent a team to compete at the 2008 Summer Olympics in Beijing, China.
The Czech Republic participated in the 2008 Summer Olympics in Beijing, China. The Czech delegation consisted of around 130 athletes.
Hungary competed at the 2008 Summer Olympics in Beijing, China. The country sent 131 individual competitors plus the men's and women's water polo teams and the women's handball team for a total of 171 athletes taking part in the 2008 Summer Olympics. Hungary's gold medal count of 3 was the lowest in the nation's Summer Olympic history since the 1924 Paris Summer Olympics. Its total medal count of 10 was the lowest since the 1928 Summer Olympics in Amsterdam.
Mexico competed at the 2008 Summer Olympics in Beijing. The country sent 85 competitors and participated in 23 sports. Mexico's flag-bearer at the opening ceremony was diver Paola Espinosa. Mexican athletes won two gold medals at the games for the first time since the 1984 Olympics.
Lithuania competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008.
Slovakia competed at the 2008 Summer Olympics in Beijing, People's Republic of China. The team includes 57 athletes in several sports.
Slovenia, represented by the Slovenian Olympic Committee, sent a team with 62 athletes to compete in 11 sports at the 2008 Summer Olympics in Beijing, People's Republic of China. The flag on the opening ceremony was held by Slovenian judoka Urška Žolnir, who was bronze in 2004 Olympics Judo Competition.
Seychelles sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Estonia competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's eleventh appearance at the Summer Olympics.
Slovakia competed in the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's fifth consecutive appearance at the Summer Olympics. The Slovak Olympic Committee sent a total of 47 athletes to the Games, 26 men and 21 women, to compete in 11 sports. There was only a single competitor in badminton, judo, triathlon, and weightlifting.
Slovenia competed at the 2012 Summer Olympics in London, United Kingdom. This was the nation's sixth consecutive appearance at the Summer Olympics. The Slovenian Olympic Committee sent the nation's third-largest delegation ever to the Games. A total of 65 athletes, 28 men and 37 women, competed in 15 sports. For the first time in its Olympic history, Slovenia was represented by more female than male athletes. Slalom kayaker and multiple-time world champion Peter Kauzer was the nation's flagbearer at the opening ceremony. The London Games also featured Slovenia's Olympic debut in triathlon.
Slovakia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's sixth consecutive appearance at the Summer Olympics after gaining its independence from the former Czechoslovakia.
Hungary (1896–1912)
Czechoslovakia (1924–1992)
