[11] The school was ranked 166th in the nation and tenth in New Jersey on the list of "America's Best High Schools 2012" prepared by The Daily Beast / Newsweek, with rankings based primarily on graduation rate, matriculation rate for college and number of Advanced Placement / International Baccalaureate courses taken per student, with lesser factors based on average scores on the SAT / ACT, average AP/IB scores and the number of AP/IB courses available to students.

[16][17][18] Prior to realignment that took effect in the fall of 2010, Cresskill was a member of the Bergen County Scholastic League (BCSL) in the Olympic Division.

[28] A 21-7 win against Pompton Lakes High School in the playoff finals gave the 1987 team the North I Group I state sectional championship and an 11-0 record.

[29] The 1989 team finished the season at 10-0-1 after winning the North I Group I state title with a 31-28 victory against Pompton Lakes High School in the championship game.

[35] In 2006, Cresskill played in the finals of the 2006 NJSIAA North I, Group I girls soccer tournament, falling to Kinnelon High School by a score of 5–0.

[37] In 2010, the boys basketball team defeated Boonton High School 60-59 to capture the North I Group I state sectional title on a basket scored with 10 seconds remaining in the game.

[41] The 2003 team won the North I, Group I title with a win over previously unbeaten County Prep High School, by a 71–65 score.

[42][43] The 2004 team repeated the feat, winning their third consecutive title by defeating North Warren Regional High School, 74–61, in the tournament final.

[44][45] In 2008, the girl's varsity basketball team won the North I, Group I state sectional championship with a 59–44 win over Belvidere High School.