The East Brunswick High School Bears compete in the Greater Middlesex Conference, which is comprised of public and private high schools in the Middlesex County area and operates under the supervision of the New Jersey State Interscholastic Athletic Association. With 2,080 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 South for football for 2018–2020.