The South Hunterdon High School Eagles compete in the Skyland Conference, which is comprised of public and private high schools covering Hunterdon, Somerset and Warren counties in west Central Jersey, and was established following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA). With 239 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 school was classified by the NJSIAA as Group I South for football for 2018–2020.