[11] The Paramus Catholic High School Paladins[6] 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.

2010 EDA National Dance Team Champions- Varsity Hip Hop and Variety and JV Jazz and Pom.

[20] The girls basketball team won the Group III state championship in 1978 (vs. Edgewood Regional High School) and in 1979 (vs.

[24] The girls soccer team won the Non-Public state championship in 1982, defeating Notre Dame High School in the tournament final.

[26] The 1983 team finished the season with a 30–1 record after winning the Group IV state championship in two games (15-11 and 15–9) against Hackensack in the final match of the tournament.

[27] The team finished the 1990 season with a 28–0 record after winning the Group IV title in two games (15-1, 15–6) against Lakeland Regional in the finals.

[28] The softball team won the Non-Public A state title in 1987, defeating runner-up Paul VI High School in the final game of the tournament.

[30] The 1992 baseball team finished the season with a 29–2 after winning the Non-Public A state championship, defeating Paul VI High School by a score of 4–2 in the final game of the tournament at Rutgers University.

[34] In 2013 and 2016, the football team won the Non-Public Group IV state sectional championship, defeating St. Peter's Preparatory School by scores of 13–6 and 33–28 respectively in the tournament final.

[38] In October 2020, eight more former Paramus Catholic students filed lawsuits accusing former hockey coach Bernard Garris of sexually abusing them.