Dana Whitney Vollmer (born November 13, 1987) is a former American competition swimmer, five-time Olympic gold medalist, and former world record-holder. At the 2004 Summer Olympics, she won a gold medal as a member of the winning United States team in the 4×200-meter freestyle relay that set the world record in the event.[2] Eight years later at the 2012 Summer Olympics, Vollmer set the world record on her way to the gold medal in the 100-meter butterfly, and also won golds in the 4×100-meter medley relay and 4×200-meter freestyle relay. She won three medals including a gold at the 2016 Summer Olympics in Rio de Janeiro.
Vollmer won a total of thirty two medals in major international competitions, including nineteen gold medals, eight silver, and five bronze, spanning the Olympics, the World Championships, the Pan American Games, the Pan Pacific Championships, and the Goodwill Games, making her one of the most decorated female Olympians in swimming.