Great Britain has the largest number of athletes with 564 at the 2012 Olympics, second by the US with 539.
204 countries participated in London Olympics 2012.
LONDON - 2012
The 2012 Olympics will be held in London, England.
USA with 530 athletes is second to Great Britain's 541 athletes on having the most athletes at the 2012 Summer Olympics
London will hold the 2012 Olympics im pretty sure.
The 2012 Olympics will be held at London, England, in the UK.
London in stratford
Bulgaria is participating in the 2012 London Olympics.