There are 215 athletes from the United States participating in the Sochi Olympics.
United States and China
According to the United States Olympic Committee, the US sent 613 athletes to compete in the 2004 Summer Olympic Games in Athens and 211 athletes to compete in the 2006 Winter Olympic Games in Turin.
There were no Winter Olympics in 1970.
258 athletes competed in the 1924 Winter Olympics.
United states of America (make me best answer)
Squaw Valley, California, United States.
United States Winter Italy Summer
Yugoslavia Winter United States Summer