When it comes to the Olympics, one athlete has made the biggest splash. American swimmer Michael Phelps is the most-decorated Olympian of all time, with 28 medals, 23 of which are gold. He also was the first athlete to win 8 gold medals at a single Olympics. In second place for career medals is Soviet gymnast Larisa Latynina, the winner of 18 medals. Next is Marit Bjørgen of Norway. With 15 medals in various cross-country skiing events, she is the most successful Winter Olympian. How do other athletes stack up? Find out in our list of the 40 Olympians with the most medals.