The Marist High School Royal Knights/Lady Knights compete in the Hudson County Interscholastic League, which includes private and parochial high schools in Hudson County, operating operates under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).
The Marist High School Royal Knights/Lady Knights compete in the Hudson County Interscholastic Athletic Association (HCIAA), which includes 22 private and parochial high schools in Hudson County. The league operates under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).