That was 204 countries at the 2008 Summer Olympics in Beijing.
list of olympic medal winning countries
According to the link on http://happyamsguy.blogspot.com/2008/08/singapore-pays-most-for-olympic-medals.html, it states the countries paying for Olympics Gold medal.
Through 14 August, the United States has won the most medals with 40 and China has won the most gold medals with 22.
The 2008 Summer Games are the first participated in by the countries of Marshall Islands, Tuvalu, and Montenegro.
you can see the countries and thier olympic stars
China won the most medals.
China
Michael Phelps
Europe had the most countries competing in the 2010 Olympics with 49 of its 51 countries competing. Kosovo does not compete as it has only claimed independence in 2008 and has yet to be fully recognized. The Vatican does not have a National Committee for the Olympic Games and thus does not compete.
USA
Are the most recent Olympic games, held in Beijing, China. They are going on right now.