yes they have but only during the summer games
There is no "winning country" in the Olympics. The games celebrate human achievement not national achievement. That being said, the US has won the most medals overall in all of the Olympics, Canada may well have won the most Gold Medals in a Winter Olympics and the US may well have won the most medals of any type in any of the Winter Olympics. I don't know which country has won the most Golds and most medals overall in the Summer Olympics.
Micheal Felps
The US won 10 gold medals at the 2002 Winter Olympics.
The US won 9 gold medals in the 2010 Winter Olympics.
So far, China I believe has won the most Gold, but US has most medals.
110 medals
the us won 13 bronze medals..
12
The US won 46 gold medals at the 2012 Summer Olympics.
So far the US won gold medals in certain events during the 2012 Olympics, but as to which country will win the most medals overall, that cannot be determined as of now.
In 47 games the USA has won 2652 Medals 2401 at the 26 summer Olympics games and 253 at the 21 Winter Games. Norway leads for total medals with 303 medals at the winter Olympics otherwise the USA has won the most medals
In the 2012 London Olympics US won 104 medals and got the first place