^Tejbir Bura was the first and only Nepalese person to receive an Olympic gold medal. During the 1924 Winter Olympic closing ceremony, the IOC awarded a gold medal in alpinism for the 1922 British Mount Everest expedition, which recognized 21 mountaineers, including the first athletes to be awarded medals posthumously, seven Indian sherpas who were killed in an avalanche on the third and last attempt to summit.
SAA , EUA , GDR , FRG → GERGermany (GER) competed 1896–1952 and from 1992. Due to the partition of Germany after World War II, Germany was represented by two teams at the 1952 Games — Germany (GER) and the Saar (SAA). The Saar was reintegrated back into the Federal Republic of Germany on 1 January 1957, and Saar athletes then competed for Germany. East Germany did not contribute athletes to the 1952 team, as the National Olympic Committee for the German Democratic Republic was only granted "provisional" recognition by the IOC in 1955. For the Games of 1956–1964, Germany participated as a United Team of Germany (EUA), representing the National Olympic Committees of both West Germany and East Germany. Retrospectively, the IOC uses the country code EUA for this team. After the NOC for the German Democratic Republic was granted full recognition by the IOC in 1968, East Germany (GDR) and West Germany (FRG) competed as two independent teams from the 1968 to the 1988 Games.
MAL , NBO → MAS Athletes from Malaya (MAL) and North Borneo (NBO) competed as independent teams at the 1956 Games and Malaya also competed at the 1960 Games, prior to the formation of the Federation of Malaysia (MAS) in 1963.
YAR , YMD → YEM Prior to Yemeni unification in 1990, North Yemen participated as the Yemen Arab Republic (YAR) in 1984 and 1988, and South Yemen participated as the Yemen Democratic Republic (YMD) at the 1988 Games. After forming united republic Yemen (YEM) has participated since 1992.
ZZX Special code used by the IOC to refer to medals won by athletes of multiple nations competing together, which was common in early Games (1896–1904). These medals are not included in the respective totals for each nation represented by individual mixed team athletes.
ABrunei's participation in the 1988 Games consisted only of a single official, but no competing athletes. This participation is not counted in Brunei's participation total.
BDjibouti at the 2004 Games took part in the Opening Ceremony, but neither athlete competed, so this participation is not counted in Djibouti's participation total.
CLiberia's athletes withdrew from 1980 Games after marching in the Opening Ceremony and took part in the boycott. This participation is not counted in Liberia's participation total.
DLibya marched in the opening ceremony of the 1964 Games, but then withdrew from competition. This participation is not counted in Libya's participation total.
ESuriname at the 1960 Games took part in the Opening Ceremony, but its lone athlete withdrew from Games due to a scheduling error. Participation of Suriname at the 1960 Games not recognized by IOC, so this participation is not counted in Suriname's participation total.
J Some sources consider Léon Thiércelin, a fencer who competed at the 1900 Games, of Haitian nationality and therefore the first Olympic appearance by Haiti. Participation of Haiti at the 1900 Games is not recognized by the IOC, so this participation is not counted in Haiti's participation total.
K Some sources consider Freydoun Malkom, a fencer who competed at the 1900 Games, of Persian nationality and therefore the first Olympic appearance by Iran. Participation of Iran at the 1900 Games is not recognized by the IOC, so this participation is not counted in Iran's participation total.
L Some sources consider Carlos de Candamo, a fencer who competed at the 1900 Games, of Peruvian nationality and therefore the first Olympic appearance by Peru. Participation of Peru at the 1900 Games is not recognized by the IOC, so this participation is not counted in Peru's participation total.
The nationalities of many medalists at the 1904 Olympics are disputed as many competitors were recent immigrants to the United States who had not yet been granted US citizenship.
PaPb Sources are inconsistent regarding Albert Corey's participation in 1904, who immigrated to the United States from France. The Games report refers to Corey as a "Frenchman wearing the colors of the Chicago Athletic Association", but the IOC attributes his medal in the marathon to the United States, and in contradiction, the medal in the four mile team race (that was won by a team of three Americans and Corey) to a mixed team composed of athletes from multiple nations instead of just the United States.
QaQb The International Olympic Committee considers Norwegian-American wrestlers Charles Ericksen and Bernhoff Hansen who immigrated from Norway to the United States to have competed for the United States. Each man won a gold medal. In 2012, Norwegian historians however found documentation showing that Ericksen did not receive American citizenship until March 22, 1905, and that Hansen, who was registered as an "alien" (foreigner) as late as 1925, probably never received American citizenship. The historians have therefore petitioned the IOC to have the athletes registered as Norwegians. In May 2013 it was reported that the Norwegian Olympic Committee had filed a formal application for changing the nationality of the wrestlers in the IOC's medal database.
RBob Fowler, an American marathon runner who competed at the 1904 Games, was a native Newfoundlander, Newfoundland is occasionally listed as a separate country at the 1904 Olympics, and would be listed as an historical NOC without medals. Participation of Newfoundland at the 1904 Games is not recognized by the IOC.
S In 2009, historians from the International Society of Olympic Historians discovered that cyclist Frank Bizzoni was an Italian citizen when he competed in 1904 being granted US citizenship in 1917. However, the IOC does not officially recognize Italy’s participation in the 1904 Olympics.
Fm The IOC counts one gold, one silver, and two bronze medals won by American fencer Albertson Van Zo Post for Cuba instead of the United States. The one silver and one bronze medal won by American Charles Tatham are also counted for Cuba instead of the United States.
^"Paris 1900". International Olympic Committee. Retrieved 2018-05-18. NOCs: 24 Athletes: 997 (22 women, 975 men) Events: 95 The IOC website affirms a total of 95 medal events, which has been the recommendation of Olympic historian Bill Mallon regarding events that should be considered "Olympic".