Canada, represented by the Canadian Olympic Committee (COC), competed at the 2008 Summer Olympics in Beijing, China, from August 8 to 24, 2008. Canadian athletes had competed in every Summer Olympic Games since 1900 with the exception of 1980, which were boycotted in protest of the Soviet invasion of Afghanistan. Canada sent 332 athletes in 25 sports, the seventh largest team at the games and Canada's largest since 1988. Canada did not send a team in handball, volleyball or basketball. Kayaker and 2004 Summer Olympics gold medalist Adam van Koeverden was the flag bearer at the opening ceremonies; Karen Cockburn bore the flag at the closing.
Sweden sent a team to compete at the 2008 Summer Olympics in Beijing, People's Republic of China.
Indonesia competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. At the games, twenty-two Indonesians had qualified to compete, while the other three had been granted a wildcard entry.
Gambia took part in the 2008 Summer Olympics, held in Beijing, China from 8 to 24 August 2008. It was Gambia's seventh appearance in the summer Olympics since its debut in 1984. The Gambia team included three athletes; runners Suwaibou Sanneh and Fatou Tiyana as well as boxer Badou Jack. Jack, a middleweight at his first Olympics, was selected as flag bearer for both the opening and closing ceremonies. None of the Gambia athletes progressed further than the qualifying heats.
Guatemala competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. In what was the country's fourteenth Summer Olympics since its debut at the 1952 Summer Olympics in Helsinki, Finland. A total of twelve athletes competed in nine sports and twelve distinct events. It was the lowest number of participants for Guatemala since the 1980 Games in Moscow, USSR. Three of the twelve athletes were taking part in their second Olympics, and one of them, race walker Luis García, participated in his fourth. In any event that involved a progression through rounds, the Guatemalan athletes did not advance past the first round; as of the Beijing Olympics, there had yet to be a Guatemalan medalist. At the opening ceremony, badminton player Kevin Cordón bore Guatemala's flag.
Thailand competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China, from August 8 to August 24, 2008.
Sudan sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. Nine competitors, all from the Darfur region and northern Sudan, represented Sudan at the Beijing games.
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.
Benin took part in the 2008 Summer Olympics which were held in Beijing, China from 8 to 24 August 2008. The country's participation at Beijing marked its eighth consecutive appearance in the summer Olympics since its debut in 1972, and its ninth Olympic appearance ever. The Benin delegation included five athletes in 2008, participating in three sports: athletics, swimming and taekwondo. Fabienne Feraez, a sprinter, was selected as the flag bearer for the opening ceremony. None of the Benin athletes progressed further than the heat round.
Burundi participated in the 2008 Summer Olympics, held in Beijing, China from 8 to 24 August 2008. It was Burundi's fourth appearance in the summer Olympics since its debut in 1996. The Burundi team included three athletes: runners Joachim Nshimirimana and Francine Niyonizigiye, as well as swimmer Elsie Uwamahoro. Niyonizigiye, a marathon runner, was flag bearer for the opening ceremony. None of the Burundi athletes progressed further than the qualifying round.
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.
Pensiri Laosirikul is a Thai weightlifting athlete, and is of Chinese descent.
Vũ Thị Hương is a track and field sprint athlete who competes internationally for Vietnam.
Siriroj Darasuriyong is a track and field sprint athlete who competes internationally for Thailand.
Sittichai Suwonprateep is a track and field sprint athlete who competes internationally for Thailand and is a naval officer with the Royal Thai Navy.
Nongnuch Sanrat is a track and field sprint athlete who competes internationally for Thailand.
Neeranuch Klomdee formerly known as Orranut Klomdee is a track and field sprint athlete who competes internationally for Thailand.
The Marshall Islands first competed in the Olympic Games at the 2008 Summer Olympics in Beijing, China. They have participated in every edition of the Summer Games since, but have never competed in the Winter Olympic Games.
Laphassaporn Tawoncharoen is a track and field sprint athlete who competes internationally for Thailand.
India competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. A total of 83 athletes, 60 men and 23 women, competed in 13 sports. Men's field hockey was the only team-based sport in which India was represented in these Olympic Games. India also marked its Olympic return in weightlifting, after the International Weightlifting Federation imposed a two-year suspension for the nation's athletes because of a doping scandal in Beijing.
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