Colombia competed at the 1984 Summer Olympics in Los Angeles, United States. 39 competitors, 36 men and 3 women, took part in 34 events in 8 sports.
Zimbabwe competed at the 1984 Summer Olympics in Los Angeles, United States. This was the fifth time that Zimbabwe had competed at an Olympic Games with the first three as Rhodesia. 15 competitors, 12 men and 3 women, took part in 18 events in 5 sports.
Djibouti took part in the 2000 Summer Olympics, which were held in Sydney, Australia from 15 September to 1 October. The country's participation at Sydney marked its fifth appearance in the Summer Olympics since its debut at the 1984 Summer Games in Los Angeles, United States. The delegation included two track and field athletes; Omar Daher Gadid in the men's marathon and Roda Ali Wais in the women's 800 metres. Gadid failed to finish the marathon, while Wais did not progress past the first round of her event.
Ghana competed at the 1984 Summer Olympics in Los Angeles, United States. The nation returned to the Olympic Games after boycotting both the 1976 and 1980 Games.
Djibouti took part in the 1992 Summer Olympics, which were held in Barcelona, Spain from 25 July to 9 August. The country's participation marked its fourth appearance in the Summer Olympics since its debut at the 1984 Summer Games in Los Angeles, United States. The delegation from Djibouti included eight athletes, five in athletics, two in judo and one in sailing. Houssein Djama, Moussa Souleiman, Omar Daher Gadid, Ahmed Salah, and Talal Omar Abdillahi represented the nation in athletics, while Youssef Omar Isahak, Alaoui Mohamed Taher represented the nation in judo. Robleh Ali Adou represented Djibouti in sailing.
Djibouti took part in the 1988 Summer Olympics which were held in Seoul, South Korea from September 17 to October 2. The country's participation marked its second appearance in the Summer Olympics since its debut at the 1984 Summer games in Los Angeles, United States. The delegation from Djibouti included six athletes, five in athletics and one in sailing. The five athletes for athletics were Hoche Yaya Aden, Ismael Hassan, Talal Omar Abdillahi, Hussein Ahmed Salah, and Omar Moussa while Robleh Ali Adou represented the nation in sailing. Ahmed Salah won the nation's first Olympic medal, which is a bronze at the Men's Marathon event.
Bahrain competed at the 1992 Summer Olympics in Barcelona, Spain. Ten competitors, all men, took part in ten events in two sports.
Trinidad and Tobago competed at the 1984 Summer Olympics in Los Angeles, United States. Sixteen competitors, eleven men and five women, took part in fourteen events in five sports.
Yugoslavia competed at the 1984 Summer Olympics in Los Angeles, United States which took place from 29 July to 12 August 1984. Yugoslav athletes had competed in every Summer Olympic Games since their official debut in 1920. The Yugoslav Olympic Committee (JOK) sent a delegation of 139 athletes, 105 men and 34 women, competing in 16 sports, down from 164 competitors in 1980. Due to the Soviet-led boycott, Yugoslavia was one of only three Communist countries to take part at the Games, along with China and Romania.
Bahrain competed in the Olympic Games for the first time at the 1984 Summer Olympics in Los Angeles, United States. Ten competitors, all men, took part in eight events in four sports.
Bangladesh sent a delegation to compete in the Olympic Games for the first time at the 1984 Summer Olympics in Los Angeles, United States from 28 July to 12 August 1984. The Bangladeshi delegation consisted of a single track and field athlete, Saidur Rahman Dawn. In his two events, the 100 metres and 200 metres, he did not qualify to advance beyond the first round.
Oman competed in the Olympic Games for the first time at the 1984 Summer Olympics in Los Angeles, United States.
Liberia competed at the 1984 Summer Olympics in Los Angeles, United States.
Qatar competed at the 1996 Summer Olympics in Atlanta, United States.
Malawi competed at the 1984 Summer Olympics in Los Angeles, California, United States. The nation returned to the Olympic Games after boycotting both the 1976 and 1980 Games. Fifteen competitors, all men, took part in sixteen events in three sports.
Papua New Guinea competed at the 1984 Summer Olympics in Los Angeles, United States. The nation returned to the Olympic Games after participating in the American-led boycott of the 1980 Summer Olympics.
Equatorial Guinea competed at the 1984 Summer Olympics in Los Angeles, United States, which were held from 28 July to 12 August. This was the first time the country took part in a Summer Olympics. The delegation consisted of four athletics competitors: sprinters Gustavo Envela and Secundino Borabota, and middle-distance runners Bartolomé Esono Asumu and Diosdado Lozano. All four failed to advance beyond the initial heats in their respective competitions. The best performance came from Envela who placed fifth in the eighth heat of the men's 100 metres.
Mauritius competed in the Olympic Games for the first time at the 1984 Summer Olympics in Los Angeles, United States.
Djibouti has participated in nine Summer Olympic Games as of the completion of the 2020 Summer Olympics in Tokyo. They have never competed in the Winter Olympic Games. Djibouti debuted at the 1984 Summer Olympics in Los Angeles, United States of America with three athletes, but did not take home a medal. The highest number of Djiboutian athletes participating in a summer Games is eight in the 1992 games in Barcelona, Spain. Only one Djiboutian athlete has ever won a medal at the Olympics, marathon runner Hussein Ahmed Salah, who won a bronze medal in the 1988 marathon.
Djibouti 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. This was the nation's ninth appearance at the Summer Olympics. Djibouti did not field any athletes at the 2004 Summer Olympics in Athens. The delegation consisted of four athletes, three men and one women, competing in five events across three sports. Two athletes participated in the judo and swimming tournaments: Aden-Alexandre Houssein and Houssein Gaber Ibrahim. Athlete Ayanleh Souleiman, a returning competitor from the 2016 Rio Olympics competed in the men's 800 metres and 1500 metres. Souhra Ali Mohamed, who had previously participated in the 2012 Summer Olympics competed in the women's 1500 metres event. Houssein lead the Djiboutian squad as the flagbearer in the opening ceremony with Souhra being the flagbearer for the closing ceremony.
