 The North Arlington High School Vikings compete as a member of Meadowlands Division A of the North Jersey Interscholastic Conference, a league that includes small high schools in the northeast part of New Jersey, following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).With 363 students in grades 10–12, the school was classified by the NJSIAA for the 2015–16 school year as North II, Group I for most athletic competition purposes, which included schools with an enrollment of 73 to 487 students in that grade range.Prior to the realignment that took effect in the fall of 2010, North Arlington was a part of the Bergen County Scholastic League's National division.