The US athlete that has won the most medals in swimmer Michael Phelps with 16 (14 gold, 2 bronze). He is second all time in medals behind gymnast Larissa Latynina of the Soviet Union who won 18 Olympic medals (9 gold, 5 silver, 4 bronze).
Michael Phelps. He has 22 medals to his name; 18 gold, 2 silver, and 2 bronze.
Most decorated swimming, most Olympic gold medals all time, and most Olympic Gold medals in a single game.
U.s.c.
Carl Lewis
As of this point in time, Mark Spitz holds that title with 11 medals in swimming: 9 gold, 1 silver, and one bronze. Michael Phelps came close to Spitz' 9 gold medals at the 2004 games, but unfortunately fell short of that goal.
Bjørn Dæhlie
Michael Phelps has the most Olympic Golds (all time), world championship medals, and much more.
Norway has won the most Winter Olympic medals all time with 280, they have also won the most gold medals with 98. The US is second with 216 total medals.
The "most decorated" male gymnasts of all time are:1. Nikolai Andrianov (Soviet Union/Russia) - 15 Olympic medals/7 gold (second most decorated male Olympican after swimmer Michael Phelps); 12 World Championship medals; 1976 Olympic AA champion; 1978 World AA champion2. Boris Shakhlin (Soviet Union/Ukraine) - 13 Olympic medals/7 gold; 14 World Championship medals; 1960 Olympic AA champion; 1958 World AA champion3. Sawao Kato (Japan) - 12 Olympic medals/8 gold; 3-time (1968, 1972, 1976) Olympic AA champion (most all time)4. Alexander Dityatin (Soviet Union/Russia) - 10 Olympic medals/3 gold; 12 World Championship medals; 1980 Olympic AA champion; 1979 World AA champion
That was the 2008 Summer Games in Beijing when Great Britain won 47 medals (19 gold, 13 silver, 15 bronze) and Australia won 46 medals (14 gold, 15 silver, 17 bronze).
University of Southern California