The country that has won the most Olympic gold medals in swimming is the United States. Over the years, U.S. swimmers have consistently dominated the sport, contributing significantly to the nation's medal tally at the Olympics. This success is attributable to a combination of factors, including advanced training techniques, access to high-quality facilities, and a deep pool of talented athletes. American swimmers have broken numerous world records and set high standards in the sport, with prominent athletes like Michael Phelps and Katie Ledecky leading the way. The U.S. continues to be a powerhouse in Olympic swimming competitions.