1976 Summer Olympics boycotted the Montreal Games when the International Olympic Committee (IOC) refused to ban New Zealand, after the New Zealand national rugby union team had toured South Africa earlier in 1976 in defiance of the United Nations' calls for a sporting embargo. The vote occurred on May 12, 1970, at the 69th IOC Session in Amsterdam, Netherlands. While Los Angeles and Moscow were viewed as the favourites given that they represented the world's two main powers, many of the smaller countries supported Montreal as an underdog and as a relatively neutral site for the games. Los Angeles was eliminated after the
South Africa at the 2018 Commonwealth Games top nine ranked nations from the Commonwealth in the 2016–17 World Rugby Sevens Series ranking. South Africa also qualified a women's team of 12. This qualification came after the South African women's team won the African Cup in 2017. The gold and silver medalist of Africa would then automatically qualify for the 2018 games. The silver medalists were Kenya. South Africa participated with 4 athletes (4 men). A total of 25 South African Swimmers has qualified for the games. This includes 2 para-swimmers. <nowiki>*</nowiki> Competed in heats only. South Africa participated with 1 athlete (1 man). South Africa participated with