The Archdiocesan Athletic Association (AAA) is a high school athletic conference comprising private high schools located in the St. Louis metro area. Most are Catholic schools, operated by the Archdiocese of St. Louis. The Conference disbanded in 2022.
The Archdiocesan Athletic Association consists of eleven high schools. The conference is divided into two divisions, split into larger and smaller schools. The conference comprises schools in Class 3, Class 4 and Class 5 (in basketball).