A country doesn't technically "win" the Olympics as the point behind it is to bring the countries together.
There was no Summer Olympics in 2007.
The country that holds the Guinness Record for most medals won in a single Summer Olympics is The United States, with 239 medals, of which 78 were gold, 82 were silver and 79 were bronze.
japan: 13
The hobos in china...
USA (45).
U.S.A
China
Soviet Union
China, with 5
China (51)
As of the 2008 Games, that would be the United States who have hosted four Summer Olympics and four Winter Olympics.
146,