The 2012 Summer Olympics in London had a total of 10,820 athletes representing 204 nations.
204 nations or National Olympic Committees (NOCs) participated in the 2012 London Olympics.
204 countries participated in the 2012 London Olympics.
204 countries participated in London Olympics 2012.
in london olympics 224 contries participated.
It depends on what year of the Summer Olympics. In 2012 and 2008, 204 nations participated in the Summer Olympics. In 2004, 201 nations participated in the Summer Olympics.
410
205