The Bahamas competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's fourteenth appearance at the Olympics, except the 1980 Summer Olympics in Moscow because of the United States boycott.
Hong Kong competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. It was the territory's thirteenth appearance at the Olympics and, at the opening ceremony, its team was the last to enter the stadium before the host nation because of the use of the Greek alphabet.
Laos competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixth appearance at the Olympics, having attended every edition of the Olympiad since 1980 except the 1984 Summer Olympics in Los Angeles, because of the Soviet boycott.
Mauritius competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixth consecutive appearance at the Olympics.
Luxembourg competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The nation has competed at every Olympic games for a century, except the 1932 Summer Olympics in Los Angeles.
Israel competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's thirteenth appearance at the Summer Olympics.
Chile competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Chilean athletes have competed at every Summer Olympic Games in the modern era, except the 1932 Summer Olympics in Los Angeles, and the 1980 Summer Olympics in Moscow because of the 1980 Summer Olympics boycott.
Singapore competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's thirteenth appearance at the Olympics, except for two different editions. Singapore was part of the Malaysian team at the 1964 Summer Olympics in Tokyo, but did not attend at the 1980 Summer Olympics in Moscow, because of its partial support to the United States boycott.
Thailand competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's thirteenth appearance at the Olympics, except the 1980 Summer Olympics in Moscow because of its partial support to the United States boycott.
Malta competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's thirteenth appearance at the Olympics since its debut in 1928.
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.
Bermuda competed at the 2004 Summer Olympics in Athens, Greece from 13 to 29 August 2004. This was the nation's fifteenth appearance at the Olympics, except the 1980 Summer Olympics in Moscow.
Madagascar competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Croatia competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's fourth consecutive appearance at the Summer Olympics since the post-Yugoslav era. The Croatian Olympic Committee sent the nation's smallest delegation to the Games since its debut in 1992. A total of 81 athletes, 66 men and 15 women, competed in 14 sports. Men's water polo, and men's handball were the only team-based sports in which Croatia had its representation in these Olympic Games.
Uruguay competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eighteenth appearance at the Olympics, except the 1980 Summer Olympics in Moscow, because of its partial support to the United States boycott.
Senegal competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eleventh appearance at the Olympics.
Honduras competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Uzbekistan 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 Olympics. The National Olympic Committee of the Republic of Uzbekistan sent a total of 70 athletes to the Games, 52 men and 18 women, to compete in 13 different sports, tying its delegation record with Sydney four years earlier. There was only a single competitor in road cycling, artistic and trampoline gymnastics, and table tennis.
Iceland competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. Icelandic athletes have competed at every Summer Olympic Games in the modern era since 1912, except for four occasions.
Zimbabwe competed at the 2012 Summer Olympics in London, UK from 27 July to 12 August 2012. This was the nation's ninth consecutive appearance at the Olympics, after gaining its independence from the former Rhodesia.
