What countries do not take part in the Olympics and why?

Answer 1

Around 10,500 athletes from 204 National Olympic Committees (NOCs) took part, countries had to be one of the 204 National Olympic Committees (NOCs) to take part in the games

Answer 2

Yes, there are nations that are not participating in the olympic games. Some are too poor to sponsor any athletes, and some for political reasons won't be participating.