 In the 2013–2014 school year, Hopatcong High School ranked eighth in Sussex County out of nine other public high schools in SAT scores.The Hopatcong High School Chiefs compete in the Northwest Jersey Athletic Conference, following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).With 394 students in grades 10-12, the school was classified by the NJSIAA for the 2015–2016 school year as North I, Group I for most athletic competition purposes, which included schools with an enrollment of 187 to 490 students in that grade range.