Ancient Olympics were only open to different greek regions.
12576428345683254325 countries competed. 12576428345683254325 countries competed.
HELLO
Greece
59
88 countries competed in the 2010 olympics.
4,955 athletes from 69 countries competed in the 1952 Summer Games in Helsinki.
204
82 nations.
i dont know 20
one
10,820 athletes from 204 countries competed in the 2012 London Olympics.
There were no Winter Olympics in 2004.