When applying this measure , the United States won the most overall medals ( 104 total medals ; 11 % ) .
China ( 88 total medals ; 9 % ) was next in this list of the most successful nations at the London Games .
When applying this measure , the United States won the most overall medals ( 104 total medals ; 11 % ) , and China ( 88 total medals ; 9 % ) was next in this list of the most successful nations at the London Games .