[15] Prior to the NJSIAA's realignment that took place in the fall of 2010, Lyndhurst was part of the Bergen County Scholastic League (BCSL).

[24][25] The football team won the NJSIAA North I Group II state sectional championship in 1983 and 2019.

[26] Finishing the season 11–0, the 1983 team defeated Newton High School by a score of 28–6 in the North I Group II championship game.

[27] The 2019 team defeated Parsippany High School by a score of 26–7 in the finals of the playoffs to win the North I Group II sectional championship for the second time.

[28] The 1990 girls volleyball team finished the season with a 19–2 record after winning the Group II state championship against runner-up Rutherford High School in two games (15-4, 15–3) in the tournament final.

[31][32] Led by Patrick Rono (son of Olympian gold-medalist Peter Rono) who won the 2010 Group I individual title,[33] the Golden Bears men's cross country team won their first North Jersey Group I sectional title, and would repeat as champions in 2013 and 2014.