The Angels of the Academy of the Holy Angels compete in the Big North Conference, which is comprised of public and private high schools in Bergen and Passaic counties, and was established following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association. Prior to realignment in 2010, the school competed in the North Bergen Interscholastic Athletic League, which consisted of public and private high schools located in Bergen County. With 866 students in grades 10-12, the school was classified by the NJSIAA for the 2019–20 school year as Non-Public A for most athletic competition purposes, which included schools with an enrollment of 381 to 1,454 students in that grade range (equivalent to Group I for public schools).