The United States.
The best successful Olympic swimmer is Federica pellegrini, an Italian.
Team U.S.A They carry all the superstars you would ever need
Lynard Skynard
It could very well be the U.S.A.
Norway
The most successful and decorated Olympic athlete as of 2014 is Michael Phelps. He has 22 Olympic medals with 18 being gold medals.
The most successful nation was China, winning five gold medals and 12 in total.
2000
China.
Well we dont no you will have to find a diffrent wep site not this on BY.
The most successfull cross-country skier ever is Björn Dählie from Norway with in total 63 gold medals including 46 world cup wins, 9 world championships and 8 olympic golds. He has also taken 4 olympic silvers adding it up to 12 olympic medals.
Mary Lou Retton