The Paramus Catholic High School Paladins compete in the Big North Conference, which is comprised of public and private high schools in Bergen and Passaic counties, 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 realignment, the school participated in the North Bergen Interscholastic Athletic League (NBIAL). With 914 students in grades 10-12, the school was classified by the NJSIAA for the 2019–20 school year as Non-Public A for most athletic competition purposes, which included schools with an enrollment of 381 to 1,454 students in that grade range (equivalent to Group III for public schools). The football team competes in the United Red 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 Non-Public Group IV for football for 2018–2020. In addition to football, cheer and girls basketball, they are also a consistent power in ice hockey, girls swimming, and boys basketball. Their biggest rivals include Bergen Catholic High School, Immaculate Heart Academy, St. Joseph Regional High School, Academy of the Holy Angels and Don Bosco Preparatory High School.