The Arizona Interscholastic Association (AIA) is one of two regulatory bodies for high school athletics and activities in the state of Arizona. It comprises all of the state's public district high schools (except Ajo High School, Beaver Dam High School and Gila Bend High School), various charter and private schools, plus a full member in Winterhaven, California and an associate member in Nogales, Sonora, Mexico.^[1] The AIA has 264 members, including 262 full members (Rincon/University are one team and Bowie/San Simon are one team) and 2 associate members. Its associate members are BASIS Chandler and Colegio Gante.

Arizona Interscholastic Association

Abbreviation	AIA
Formation	1913 (1925 in current form)
Legal status	Association
Purpose	Athletic/Educational
Headquarters	7007 North 18th St. Phoenix, AZ 85020
Region served	Arizona
Membership	266 schools
Official language	English
Executive Director	David Hines
Affiliations	National Federation of State High School Associations
Staff	18
Website	aiaonline.org

The AIA is not the only high school sports regulatory body in Arizona (the Canyon Athletic Association coordinates events for smaller schools, especially charter schools), but it is the largest.