Great Brittain
No it is not, The Olympics are won and given to the country who bided the most for it.
At the first modern Olympics held in Athens, Greece in 1896, Greece won the most medals with 47 (10 gold, 18 silver, 19 bronze).
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.
USA.
Norway
Norway.
The country with the most gold medals at the Rio 2016 Olympics was the United States with 46 total.
If you are referring to the Olympics, then the United States is the country with the most medals, followed by Russia.
What country has won the most medals in 2012 olympics so far
Germany had the most gold medals at the 2006 Winter Olympics with 11.
china and they won 51 medals.