 The Carteret High School Ramblers compete in the Greater Middlesex Conference, which includes public and private high schools located in the greater Middlesex County area and operates under the supervision of the New Jersey State Interscholastic Athletic Association (NJSIAA).With 770 students in grades 10–12, the school was classified by the NJSIAA for the 2019–20 school year as Group III for most athletic competition purposes, which included schools with an enrollment of 761 to 1,058 students in that grade range.For football, the school was classified by the NJSIAA as North Jersey Group III for 2018–20.