The Philippines competed at the 2004 Summer Olympics in Athens, 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.
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.
Namibia 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 Olympics.
The Maldives competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. The delegation's participation in the Athens Olympics marked the Maldives' fifth appearance at the Summer Olympics since their debut at the 1988 Summer Olympics in Seoul, South Korea. Four athletes competed across two sports; Sultan Saeed and Shifana Ali in track and field, and Hassan Mubah and Aminath Rouya Hussain in swimming. None of the track or swimming athletes advanced past the first round in their events, and no Maldivian has won a medal in any events. Sultan Saeed bore the Maldives' flag during the parade of nations of the opening ceremony.
Barbados competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This nation marked its ninth appearance at the Olympics, except the 1980 Summer Olympics in Moscow because of the United States boycott.
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.
Swaziland competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Grenada 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.
Sri Lanka competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
Belize sent a delegation to compete at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the Central American country's ninth appearance at a Summer Olympic Games. The delegation consisted of two track and field athletes: Michael Aguilar and Emma Wade; neither advanced beyond the first round of their events.
Uganda competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004. This was the nation's twelfth appearance at the Olympics, except the 1976 Summer Olympics in Montreal, because of the African boycott. The Ugandan Olympic Committee sent a total of eleven athletes to the Games, nine men and two women, to compete in four different sports. Half of these athletes had been participating in boxing, including Joseph Lubega, who later became the nation's flag bearer in the opening ceremony. There was only a single competitor in swimming and weightlifting.
Equatorial Guinea competed at the 2004 Summer Olympics in Athens, which was held from 13 to 29 August 2004. The country's participation at Athens marked its sixth appearance in the Summer Olympics since its début at the 1984 Summer Olympics. The delegation included two athletics competitors: Roberto Mandje and Emilia Mikue Ondo in the long and middle distance disciplines respectively. Mikue Ondo was selected as the flag bearer for the opening ceremony. Both athletes did not advance further than the first round of their respective events with Mandje failing to make the start of the men's 3000 metres steeplechase.
Chad competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012. This marked the nation's eleventh appearance at the Summer Olympics since its debut in the 1964 Summer Olympics. The Chadian delegation included track and field athlete Hinikissia Ndikert and judoka Carine Ngarlemdana. Ngarlemdana was the flag bearer for the opening ceremony and Ndikert was the flag bearer for the closing ceremony. Neither of Chad's athletes progressed beyond the first round of their events. Chad was one of only two countries to have a female-only team at the 2012 games.
Eswatini (Swaziland) competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012. The country's participation at London marked its ninth appearance in the Summer Olympics since its debut at the 1972 Summer Olympics. The delegation included two track and field athletes: Sibusiso Matsenjwa and Phumlile Ndzinisa, and one swimmer, Luke Hall; the first two competitors qualified for the Games through wildcard places while Hall was awarded a universality place by FINA. Hall was selected as the flag bearer for the opening ceremony and Matensjwa held it for the closing ceremony. All three competitors did not advance further than the heat stages of their respective events.
Jan Sekpona is a retired Togolese middle-distance runner, who specialized in the 800 metres. Sekpona qualified for the Togolese squad in the men's 800 metres at the 2004 Summer Olympics in Athens by attaining an entry time and a personal best of 1:52.40. Running against seven other athletes in heat three, Sekpona crossed the finish line by nearly ten minutes behind leader Wilson Kipketer of Denmark with an eighth-place time in 1:54.25. Sekpona failed to advance into the semifinals as he placed farther from two automatic slots for the next round and ranked no. 70 overall in the prelims. Sekpona was also appointed as the Togolese flag bearer by the National Olympic Committee in the opening ceremony.
Sanna Abubkheet is a retired female Palestinian middle-distance runner, who specialized in the 800 metres. Abubkheet qualified for the Palestinian squad in the women's 800 metres at the 2004 Summer Olympics in Athens by receiving a wild card entry slot from IAAF. Running against seven other athletes in heat three, Abubkheet crossed the finish line by more than half a minute behind leader and top medal favorite Kelly Holmes of Great Britain with a seventh-place time in 2:32.10. Abubkheet failed to advance into the semifinals as she placed farther from two automatic slots for the next round and ranked no. 42 overall in the prelims. Building a historic milestone as the first female athlete from Gaza Strip to compete at the Olympics, Abubkheet was appointed by the Palestine Olympic Committee to carry the nation's flag in the opening ceremony.
Youba Mohamed Ould H'meïde is a retired Mauritanian sprinter, who specialized in the 400 metres. He represented Mauritania at the 2004 Summer Olympics, and also set a national record and a personal best of 47.87 on his sporting debut from the 2001 IAAF World Championships in Edmonton, Alberta, Canada.
Hamoud Abdallah Said Al-Dalhami is a retired Omani sprinter, who specialized in both 100 and 200 metres. He represented Oman in two editions of the Olympic Games, and also attained personal bests of 10.44 and 20.94 from the 1999 Pan Arab Championships in Beirut, Lebanon.
Swaziland competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The country's participation in Rio de Janeiro marked its tenth appearance at the Summer Olympics since its debut in 1972. The delegation included two track and field athletes: Sibusiso Matsenjwa in the men's 200 metres and Phumlile Ndzinisa in the women's 100 metres. Both athletes participated at the Games through wildcard places since they did not meet the required standards to qualify. Neither athletes progressed past their heats, although Matsenjwa set a new national record.
The Maldives competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's eighth consecutive appearance at the Summer Olympics. The delegation included two track and field athletes: Hassan Saaid and Afa Ismail, as well as swimmers Ibrahim Nishwan and Aminath Shajan. Both Shajan and Ismail were returning competitors from the 2012 London Olympics, with the former leading the Maldivian squad as the flag bearer in the opening ceremony. The Maldives, however, has yet to win its first ever Olympic medal.
Eswatini 
