Antigua and Barbuda competed at the 2004 Summer Olympics in Athens, Greece from 13 to 29 August 2004.
Australia competed at the 1932 Summer Olympics in Los Angeles, United States. Due to the Great Depression, Australia could only afford to send 13 athletes to the Games.
Australia competed at the 1928 Summer Olympics in Amsterdam, Netherlands. 18 competitors, 14 men and 4 women, took part in 26 events in 6 sports.
Saint Kitts and Nevis competed in the Olympic Games for the first time at the 1996 Summer Olympics in Atlanta, United States. The country sent ten athletes to compete, all in the sport of athletics. None of the athletes received a medal.
The Solomon Islands send a team to compete at the 2008 Summer Olympics in Beijing, China. The country's delegation consisted of three athletes competing in two sports across three distinct events; Francis Manioru and Pauline Kwalea represented the Solomon Islands in track, while Wendy Hale competed in weightlifting. The arrival of the Solomon Islander delegation in Beijing marked its seventh appearance since its debut at the 1984 Summer Olympics in Los Angeles. The track athletes did not advance past the first rounds in their events. There were no medalists from the Solomon Islander athletes in these Games. Wendy Hale was the Solomon Islands' flagbearer during the Games' opening ceremony.
Antigua and Barbuda competed at the 2008 Summer Olympics in Beijing, China, submitting a delegation that included athletes Daniel Bailey, Brendan Christian, James Grayman, and Sonia Williams in track and field events, and Kareem Valentine in swimming. Antigua and Barbuda's appearance in Beijing marked its eighth appearance at the Summer Olympics since the nation's debut at the 1976 Summer Olympics in Montréal, Canada. There were no medalists from Antigua and Barbuda in 2008, although Bailey reached the quarterfinals and Christian the semifinals of their respective events.
The Saint Kitts and Nevis National Olympic Committee sent four athletes to the 2008 Summer Olympics in Beijing, China. All four participated in the track and field competitions across four different events. Three women and one man comprised the Kittitian delegation. Williams and Ponteen did not advance past Qualifications in their events; Hodge reached quarterfinals in both the 100m and 200m sprints; and Collins, who participated in two events, reached the Semifinal round in the 100m sprint, and ranked sixth in the finals in the 200m sprint. Saint Kitts and Nevis did not win any medals during the Beijing Olympics. The flag bearer for the team at the opening ceremony was first-time Olympian Virgil Hodge.
Suriname sent a delegation of four people to compete at the 2008 Summer Olympics in Beijing, China: two athletes (Jurgen Themen and Kirsten Nieuwendam and two swimmers who participated in four distinct events. The appearance of Suriname at Beijing marked its tenth Olympic appearance, which included every Olympic games since the 1968 Summer Olympics in Mexico City and excluded the 1980 Summer Olympics in Moscow. Its four athletes did not advance past the first round in each of their events. The Surinamese flag bearer in Beijing was not an athlete, but Anthony Nesty, the only medalist in Surinamese history and the nation's Olympic swimming coach.
Trinidad and Tobago sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. Its participation in the Beijing games marked its eighteenth Olympic appearance and fifteenth Summer Olympic appearance since its debut at the 1948 Summer Olympics in London, excluding its joint participation with Jamaica and Barbados in 1960 as the West Indies Federation. With 28 athletes, more Trinidadians had competed at the Olympics than in any other single Olympic Games in its history before Beijing. Athletes representing Trinidad and Tobago advanced past the preliminary or qualification rounds in twelve events and reached the final rounds in four of those events. Of those four events, silver medals were won in the men's 100 meters and in the men's 4x100 meters relay. The latter was upgraded to gold due to one member of the quartet that crossed the line first, Nesta Carter, testing positive for a banned substance, resulting in their disqualification. The nation's flag bearer at the opening ceremony that year was swimmer and Athens medalist George Bovell.
Niger sent five athletes, their second largest contingent ever, equalling the most sports in which they have participated. to compete at the 2008 Summer Olympics in Beijing, China. It was Niger's 10th Olympics; their only medalist has been Issaka Dabore, in boxing, at the 1972 games.
Antigua and Barbuda competed in the 2010 Commonwealth Games held in Delhi, India, from 3 to 14 October 2010. Despite concerns about safety and their accommodations, the team planned to compete. Antigua and Barbuda competed in athletics, cycling, shooting, swimming and boxing. The delegation was made up of seventeen athletes and nine officials.
Antigua and Barbuda competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's ninth appearance at the Summer Olympics.
Antigua and Barbuda competed at the 2015 Pan American Games in Toronto, Ontario, Canada from July 10 to 26, 2015. The Chef de mission of the team was Howard Everton Cornelius.
Antigua and Barbuda competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. This was the nation's tenth appearance at the Summer Olympics.
Antigua and Barbuda competed at the 2019 Pan American Games in Lima, Peru from July 26 to August 11, 2019.
Antigua and Barbuda competed at the 2019 World Championships in Athletics in Doha, Qatar, from 27 September to 6 October 2019. Antigua and Barbuda were represented by sole athlete Cejhae Greene, who participated in the men's 100 metres event.
Antigua and Barbuda competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic. It was the nation's eleventh appearance at the Summer Olympics.
Mauritania competed at the 2020 Summer Olympics in Tokyo which were held from 23 July to 8 August 2021. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed due to the COVID-19 pandemic. It was the nation's tenth appearance at the Summer Olympics since its debut in 1984. The delegation consisted of two athletes, one man and one woman, competing in two athletic events. Sprinters Abidine Abidine and Houlèye Ba represented Mauritania in the men's 5000 metres and women's 800 metres event, respectively. For the first time, in an effort to promote gender equality, two flagbearers, one male and one female were allowed at the Olympics. Abidine and Houlèye lead the Mauritanian squad as the flagbearers in the opening ceremony. As of 2023, Mauritania, however, has yet to win its first ever Olympic medal.
Antigua and Barbuda competed at the 2023 World Athletics Championships in Budapest, Hungary, from 19 to 27 August 2023.
Antigua and Barbuda is scheduled to compete at the 2024 Summer Olympics in Paris from 26 July to 11 August 2024. It will be the nation's twelfth appearance at the Summer Olympics.
