The fastest swimmer in Olympic history is Michael Phelps. With a remarkable career, Phelps has won a total of 28 Olympic medals, including 23 golds, making him a legendary figure in swimming. His accomplishments have set world records, particularly in the 200m and 400m individual medley and various freestyle events. Phelps' combination of speed, technique, and stamina has redefined excellence in the sport, inspiring countless swimmers and solidifying his legacy in Olympic history.