The Arizona Interscholastic Association (AIA) is one of two regulatory bodies for high school athletics and activities in the U.S. state of Arizona. It comprises all of the state's public district high schools, various charter and private schools, plus a full member in Winterhaven, California and an associate member in Nogales, Sonora, Mexico. The AIA has 264 members, including 262 full members and 2 associate members. Its associate members are BASIS Chandler and Colegio Gante.