53 countries
A grand total of 205 countries are participating in London's 2012 Olympics.
32 countries
136
Athletes from over 200 different countries will be participating in the 2012 summer Olympics
204
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Wenlock & Mandeville
Oscar Pistorius
Official data: 204 countries.
There are 205 countries participating in the 2012 Olympics.
Yes, Liberia is participating in the 2012 Olympics.