Hopatcong High School is a four-year comprehensive public high school serving students in ninth through twelfth grades from Hopatcong, in Sussex County, New Jersey, United States, operating as the lone secondary school of the Hopatcong Public Schools. As of the 2013-14 school year, the school had an enrollment of 578 students and 53.7 classroom teachers (on an FTE basis), for a student–teacher ratio of 10.8:1. There were 95 students (16.4% of enrollment) eligible for free lunch and 52 (9.0% of students) eligible for reduced-cost lunch.