[15] The school was ranked 198th in the nation and 16th 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.

[19] The Tenafly High School Tigers[2] 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 (NJSIAA).

[22] The football team competed in the Ivy White 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 co-op program operates under agreements scheduled to expire at the end of the 2023–24 school year.

[29] The boys' cross country team won the Group III state championship three consecutive years, from 1955 to 1957.

[32] The 1975 boys' soccer team finished the season with a record of 18-1-2 after a scoreless tie in the playoff finals with Ewing High School made them the Group III co-champion.

[39] The team won the 2006 Group II state championship, defeating Rumson-Fair Haven 3–2 in the semifinals and West Essex by 3–2 in the finals to take the title.

[43][44][45] The 2019 team won the Group III title over West Windsor-Plainsboro High School North 4–1 in the tournament final.

[50] The girls volleyball team won the Division B state championship in 1981 (against Park Ridge High School in the final match of the tournament) and won the Group II title in 1982 (vs. Garfield High School).

[51] The 1981 team won the inaugural NJSIAA state title, winning the Group I-II championship in two games (15-11, 16–14) against finals opponent Park Ridge.

[54] The team made the Public B state finals in 2012 but fell to Summit High School by a score of 2–1 in overtime.