France, Great Britain, and Switzerland.
Greece, Australia, France, Switzerland and Great Britain have competed at every summer games of the modern era.
Australia has had representatives at every modern summer Olympic Games, although they competed as 'Australasia' in 1908 and 1912 combined with New Zealand. Australians have won medals at every modern summer Olympics except for 1908 in St Louis.
I think the earliest that China was in the olympic games was in 1956. go search wikipedia for it and scroll down to the list of participating countries. Australia was involved in the very first of the modern Olympic games in 1896 (although this is a debatable point). They have participated in every Olympics since, one of only a couple of countries to do so.
The Olympic Games are a modern group of internationally-participated competitions, held alternatively every 2 years in either summer or winter. The term also refers to the ancient version, which was more of a festival, that occurred in Greece. == ==
Jamaica first participated in the Summer Olympics in 1948 and has participated in every Summer Olympics since then.
Switzerland, Great Britain.
Yes, Austria has participated in all 21 Winter Olympics (through the 2010 Games in Vancouver).
Five countries - Australia, France, Great Britain, Greece and Switzerland - have sent teams to every single Summer Olympic Games. Fadi Amro