In the 2014 Sochi Olympics, a total of 88 countries participated in the events. This worked out to be about 2,800 athletes altogether.
78 years (New Zealand)
One country- Greece.
USA
As a separate country Belarus has competed in the '96, '00, '04, and the '08 summer games. They have also competed in the '94, '98, '02 and the '06 winter games. A year after they declared independence from the ussr they competed with eleven other former ussr countries on a unified team in the '92 Summer Olympics.
Not every country that completed has a Gold Medalist. More than half do not have a medal winner at all
in the finals 32 countries competed
Susie O'Neill competed for Australia.
Ireland has competed in many things, and has many Olympic medallists, and winners in all sorts of sports and competitions.
Russia was the largest country to compete in the 2004 Olympics.
No country is a part of the IOC that does not compete in the Olympics.
Kenya has competed at fifteen Commonwealth Games.
usa and basketball