Nathan Ghar-jun Adrian (born December 7, 1988) is an American competitive swimmer and five-time Olympic gold medalist who formerly held the American record in the long course 50-meter freestyle event.
In his Olympic debut at the 2008 Summer Olympics, Adrian swam in the heats of the 4×100-meter freestyle relay and earned a gold medal when the United States team won in the final. At the 2012 Summer Olympics, Adrian won gold medals in both the 100-meter freestyle and the 4×100-meter medley relay, and a silver medal in the 4×100-meter freestyle relay. He has won thirty-two medals in major international competitions; twenty gold, seven silver, and five bronze in such competitions as the Summer Olympics, the FINA World Aquatics Championships, and the Pan Pacific Swimming Championships. In the 2016 Summer Olympics 4x100-meter freestyle relay a gold was won with Michael Phelps, Caeleb Dressel, and Ryan Held. He was an individual bronze medalist in the 50-meter and 100-meter freestyles.