529 all together.
none.
There are 529 athletes on the 2012 US Olympic team. There are 268 women and 261 men.
530
216
215.
Yes, people that play for the NHL-USA can still play for the Canadian Olympic team. (Sydney Crosby, Pittsburgh Penguins/ Team Canada)
About 1,000,000 athletes.
Yes the US Virgin Islands has an olympic team.
3
The United States Olympic Committee sent a total of 530 athletes.
45
Zero
It depends on what country you are talking about. The 2008 US Olympic rowing team had 45 members.