The Elizabeth High School Minutemen compete in the Union County Interscholastic Athletic Conference, which is comprised of public and private high schools in Union County and was established following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association. Prior to the 2010 reorganization, the school had competed in the Watchung Conference, which consisted of public and private high schools in Essex County, Hudson County and Union County in northern New Jersey. With 5,049 students in grades 10-12, the school was classified by the NJSIAA for the 2019–20 school year as Group IV for most athletic competition purposes, which included schools with an enrollment of 1,060 to 5,049 students in that grade range. The school was classified by the NJSIAA as Group V North for football for 2018–2020.