On behalf of the Cook Islands the Cook Islands Sports and National Olympic Committee sent a team to the 2008 Summer Olympics in Beijing, China, marking its sixth consecutive appearance at the Olympics since its debut in the 1988 Summer Olympics in Seoul, South Korea. The country sent four athletes to the Games across three sports and four distinct events. No athlete of the Cook Islander delegation progressed past the first rounds in their events and did not go on to win medals. Pera was the nation's flag bearer at the ceremonies.
Samoa sent a delegation to compete at the 2008 Summer Olympics in Beijing, China. The country was represented by a total of six athletes. The country's flagbearer during the Games' opening ceremony was weightlifter Ele Opeloge. Samoa won its first Olympic medal due to medals reallocation after the IOC's retesting of doping samples in 2016.
Madagascar competed at the 2008 Summer Olympics in Beijing, People's Republic of China. The country sent six representatives to compete in four sports.
Pakistan competed at the 2008 Summer Olympics in Beijing, China. The country sent 21 athletes, including two women. The men's field hockey team comprised 16 players out of the Pakistani delegation.
Colombia competed at the 2008 Summer Olympics. The country sent 68 athletes to compete in 15 sports, making this Colombia's largest ever delegation to the Olympics.
Myanmar competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. The country, also known as Burma, sent a total of six representatives to compete in five sports: athletics, swimming, archery, canoeing and rowing.
Romania competed in the 2008 Summer Olympics, held in Beijing, China from August 8 to August 24, 2008. Romania intended to send 104 competitors to Beijing, although the delegation was reduced to 102 when two Romanian athletes were suspended for doping before the start of the Olympics. The Romanian delegation for Beijing was the smallest Romanian Olympic delegation since the 1989 Revolution. Romanians competed in 16 sports: athletics, archery, handball, gymnastics, wrestling, swimming, diving, weightlifting, fencing, table tennis, shooting, tennis, judo, boxing, kayak-canoeing, and rowing.
The Democratic Republic of the Congo competed in the 2008 Summer Olympics which were held in Beijing, People's Republic of China from August 8 to August 24, 2008. The country's delegation consisted of 29 people, including coaches and sports officials. Athletes from the DRC competed in athletics, judo, boxing and swimming.
Guyana sent a team to compete at the 2008 Summer Olympics in Beijing, China. Four representatives of Guyana qualified to take part in the Beijing Games–Adam Harris, Marian Burnett, and Aliann Pompey in track, and Niall Roberts in swimming–and Pompey advanced past the first round in her event, progressing to semifinals. Meanwhile, Alika Morgan and Geron Williams (cycling) took part in the Games’ Youth Olympics camp, held in Beijing at the same time as the Olympics. Along with coaches and administrative members, Guyana sent a total of ten people to Beijing. The appearance of Guyana's delegation in Beijing marked the fifteenth Guyanese Olympic delegation to appear at an Olympic games, which started with their participation as British Guiana in the 1948 Summer Olympics. There were no medalists from Guyana at the Beijing Olympics. Roberts was Guyana's flagbearer at the ceremonies in Beijing.
Cambodia competed in the 2008 Summer Olympics, held in Beijing, People's Republic of China from August 8 to August 24, 2008. The country sent a total of four competitors to the Games.
Malawi sent a delegation of four representatives to compete at the 2008 Summer Olympics in Beijing, People's Republic of China.
Panama competed in the 2008 Summer Olympics which was held in Beijing, People's Republic of China from August 8 to August 24, 2008. Yesika Jimenez was the delegation's flagbearer at the Opening Ceremony.
Eritrea sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Guinea-Bissau sent a delegation of 32 people, 3 of them athletes who competed, to the 2008 Summer Olympics in Beijing, China.
Lesotho sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Liberia sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Libya sent a delegation of 7 athletes to compete at the 2008 Summer Olympics in Beijing, China.
Seychelles sent a delegation to compete at the 2008 Summer Olympics in Beijing, China.
Vanuatu competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's seventh appearance at the Olympics.
Tuvalu competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. The country's participation at Rio de Janeiro marked its third consecutive appearance at the Summer Olympics since its debut in 2008. The delegation included a single track and field athlete: sprinter Etimoni Timuani. Etimoni was also the nation's flagbearer in the Parade of Nations. He did not progress past the first round of his men's 100 metres competition.
