The Boonton High School Bombers compete in the Northwest Jersey Athletic Conference (NJAC), which includes 39 public and private high schools in Morris and Sussex counties, following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA). Before the 2010 realignment, the school had competed in the Colonial Hills Conference, which includes public and private high schools in Essex, Morris and Somerset counties. With 459 students in grades 10-12, the school was classified by the NJSIAA for the 2019–20 school year as Group I for most athletic competition purposes, which included schools with an enrollment of 75 to 476 students in that grade range. The football team competes in the National Blue division of the North Jersey Super Football Conference, which includes 112 schools competing in 20 divisions, making it the nation's biggest football-only high school sports league. The school was classified by the NJSIAA as Group I North for football for 2018–2020.