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.
Kenya 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, except the 1976 Summer Olympics in Montreal and the 1980 Summer Olympics in Moscow because of the African and United States boycott.
The British Virgin Islands competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's sixth appearance at the Summer Olympics since its debut in the 1984 Summer Olympics. The British Virgin Islands delegation included only one athlete, meaning the country, along with Brunei and Liechtenstein, sent the lowest number of athletes to the 2004 Summer Games. The athlete selected was sprinter Dion Crabbe, an athlete who qualified for the Olympics by meeting the "A" standard time required for his event, the men's 200 meters. Crabbe was also selected as flag bearer for the opening ceremony. He did not progress beyond the heats, meaning the British Virgin Islands won no medals at this Summer Olympics.
Dominica competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its third appearance in the Summer Olympics since its debut in the 1996 Summer Olympics. Two track and field athletes, Chris Lloyd and Marie-Lyne Joseph were selected to represent the nation, the latter by a wildcard place as the nation had no other athletes that met either the "A" or "B" qualifying standards apart from Lloyd. Lloyd was selected as flag bearer for the opening ceremony.
São Tomé and Príncipe competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August 2004. The country's participation at Athens marked its third appearance in the Summer Olympics since its debut in the 1996 Summer Olympics.
Kyrgyzstan competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's third appearance at the Olympics in the post-Soviet era.
Sierra Leone competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's eighth appearance at the Summer Olympics since its debut in the 1968 Summer Olympics. The Sierra Leone delegation included two track and field athletes; Lamin Tucker and Hawanatu Bangura, both of whom were sprinters that were selected via winning an event in Freetown, as the nation had no athletes that met the "A" or "B" standards in any event. Bangura was selected as flag bearer for the opening ceremony. Neither of the two athletes progressed beyond the heats.
Brunei, as Brunei Darussalam, competed at the 2004 Summer Olympics in Athens, Greece, which took place between 13 and 29 August 2004. The country's participation in Athens marked its fourth appearance at the Summer Olympics since its debut in the 1988 Summer Olympics.
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.
Mauritania competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The country's participation at Athens marked its sixth appearance in the Summer Olympics since its debut in the 1984 Summer Olympics. The delegation included two track and field athletes, Youba Hmeida and Aminata Kamissoko, who were both selected by wildcards after both failed to meet either the "A" or "B" qualifying standards. Hmeida was selected as the flag bearer for the opening ceremony. Neither of the Mauritanians progressed beyond the heats.
Vanuatu competed at the 2004 Summer Olympics in Athens, Greece, which was held from 13 to 29 August 2004. The nation's appearance at the 2004 Athens Games marked its fifth appearance at the Summer Olympics since its debut at the 1988 Summer Olympics.
Moldova competed at the 2004 Summer Olympics in Athens, from 13 to 29 August 2004. This was the nation's third consecutive appearance at the Summer Olympics in the post-Soviet era.
Saint Lucia competed at the 2004 Summer Olympics in Athens, Greece from 13 to 29 August 2004. Saint Lucia's athletes marched out first at the parade of nations at the Opening Ceremony as the first country in order of the Greek alphabet, and because hosts Greece marched last instead of their usual position at the head of the parade.
São Tomé and Príncipe competed at the 2000 Summer Olympics in Sydney, Australia, which took place between 15 September to 1 October 2000. The country's participation in Sydney marked its second appearance at the Summer Olympics since its debut in the 1996 Summer Olympics.
East Timor (Timor-Leste) competed at the 2008 Summer Olympics in Beijing, China which was held from 8 to 24 August. The country's participation at Beijing marked its second appearance in the Summer Olympics since its debut in the 2004 Summer Olympics. The delegation included Augusto Ramos Soares and Mariana Diaz Ximenez, both of whom were marathoners that qualified via wildcard places as the nation had no athletes that met the "A" or "B" qualifying standards. Ximenez was selected as flag bearer for the opening ceremony. Neither of the two athletes finished their events; Soares did not even start.
Djibouti competed at the 2012 Summer Olympics in London, from July 27 to August 12, 2012. This was the nation's seventh appearance at the Olympics.
East Timor, also known as Timor-Leste and officially as the Democratic Republic of Timor-Leste, competed at the 2012 Summer Olympics in London, held from July 27 to August 12, 2012. This was the nation's fourth appearance at the Olympics, although it was first appeared as part of the Individual Olympic Athletes. Two marathon runners were selected to the team by wildcard places, without having qualified at any sporting event. East Timor, however, has yet to win its first Olympic medal.
Eritrea competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. It was the nation's fifth consecutive appearance at the Summer Olympics.
Brunei, officially known as Brunei Darussalam, competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's seventh appearance at the Summer Olympics since its debut at the 1988 Summer Olympics. Brunei failed to register any athletes in two editions of the Games: 1992 in Barcelona and 2008 in Beijing.
East Timor, also known as Timor-Leste and officially as the Democratic Republic of Timor-Leste, competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's fourth consecutive appearance at the Summer Olympics.
Individual Olympic Athletes (2000)