Denmark competed at the 1968 Summer Olympics in Mexico City, Mexico. 64 competitors, 60 men and 4 women, took part in 53 events in 11 sports.
Ethiopia competed at the 1968 Summer Olympics in Mexico City, Mexico. 18 competitors, all men, took part in 13 events in 3 sports.
Finland competed at the 1968 Summer Olympics in Mexico City, Mexico. 66 competitors, 60 men and 6 women, took part in 61 events in 13 sports.
The Netherlands competed at the 1968 Summer Olympics in Mexico City, Mexico. 107 competitors, 82 men and 25 women, took part in 52 events in 11 sports.
New Zealand at the 1968 Summer Olympics was represented by a team of 52 competitors, 47 men and five women, who took part in 26 events across eight sports. Selection of the team for the Games in Mexico City, Mexico, was the responsibility of the New Zealand Olympic and British Commonwealth Games Association. New Zealand's flagbearer at the opening ceremony was Don Oliver. The New Zealand team finished 27th on the medal table, winning a total of three medals, one of which was gold.
Australia competed at the 1968 Summer Olympics in Mexico City, Mexico. Australian athletes have competed in every Summer Olympic Games. 128 competitors, 104 men and 24 women, took part in 105 events in 16 sports.
Belgium competed at the 1968 Summer Olympics in Mexico City, Mexico. 82 competitors, 77 men and 5 women, took part in 55 events in 13 sports.
Canada competed at the 1968 Summer Olympics in Mexico City, Mexico, held from 12 to 27 October 1968. 139 competitors, 111 men and 28 women, took part in 124 events in 14 sports. It is the inaugural Summer Olympics where the Canadian team marched under the new Maple Leaf flag. The youngest competitor for Canada was gymnast Theresa McDonnell who was 14 years old. The oldest competitor was equestrian Zoltan Sztehlo who was 46 years old.
Thailand competed at the 1968 Summer Olympics in Mexico City, Mexico. 41 competitors, all men, took part in 18 events in 6 sports.
Uruguay competed at the 1968 Summer Olympics in Mexico City, Mexico. 27 competitors, 21 men and 6 women, took part in 31 events in 8 sports.
France competed at the 1968 Summer Olympics in Mexico City, Mexico. 200 competitors, 169 men and 31 women, took part in 107 events in 16 sports.
Italy competed at the 1968 Summer Olympics in Mexico City, Mexico. 167 competitors, 152 men and 15 women, took part in 103 events in 17 sports.
Sweden competed at the 1968 Summer Olympics in Mexico City, Mexico. 100 competitors, 86 men and 14 women, took part in 95 events in 13 sports.
Great Britain, represented by the British Olympic Association (BOA), competed at the 1968 Summer Olympics in Mexico City, Mexico. 225 competitors, 175 men and 50 women, took part in 133 events in 16 sports. British athletes have competed in every Summer Olympic Games.
Athletes from West Germany competed at the 1968 Summer Olympics in Mexico City, Mexico. It was the first time that East Germany and West Germany sent separate teams to the Summer Olympic Games. 275 competitors, 232 men and 43 women, took part in 154 events in 17 sports for West Germany. As the country hosted the next Olympics in Munich, the West German flag was raised at the closing ceremony.
Czechoslovakia competed at the 1968 Summer Olympics in Mexico City, Mexico. 121 competitors, 94 men and 27 women, took part in 66 events in 14 sports.
Poland competed at the 1968 Summer Olympics in Mexico City, Mexico. 177 competitors, 140 men and 37 women, took part in 112 events in 16 sports.
Taiwan competed at the 1968 Summer Olympics in Mexico City, Mexico. 43 competitors, 35 men and 8 women, took part in 57 events in 8 sports.
Congo-Kinshasa competed at the 1968 Summer Olympics in Mexico City, Mexico. It was the first time that the nation was represented at the Olympic Games. Five competitors, all men, took part in two events in the cycling.
The Satellite Circuit was a temporary cycling venue constructed for the 1968 Summer Olympics in Mexico City. This venue hosted the road cycling individual road race and road team time trial events for those games.
