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104 nations
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At London 2012, 3 countries allowed women to compete at the Olympics for the first time. These were Saudi Arabia, Qatar and Brunei.
Many countries had athletes that did not get past the qualification rounds to compete for the medals
Total of 10,820 athletes competed at the 2012 London Olympics.
204 countries participated in the 2012 London Olympics.
An estimated 10,500 athletes will compete at the 2012 London Olympics.
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Vatican City
kelly Holmes is going to compet in the London 2012 Olympics
204 countries participated in London Olympics 2012.