The Amateur Athletic Union, commonly known as AAU, is one of the most influential organizations in American youth sports. Founded in 1888, the AAU originally governed many amateur sports across the United States, including Olympic development programs. Over time, its role evolved into organizing large national youth competitions and club-based teams, particularly in basketball, volleyball, track and field, and other sports.
In modern youth sports, “playing AAU” usually refers to participating on a competitive club team that travels to regional and national tournaments outside the traditional school system. These teams often compete year-round and bring together players from multiple schools who want higher-level competition and exposure.
AAU tournaments have become especially important in basketball recruiting, where college coaches and scouts evaluate prospects during large weekend events. While AAU programs vary in quality and structure, they have become a central part of the youth sports landscape across the United States.