[1] The campus includes one central building, which, along with the original gym, was completed in 1919 at a total cost of $285,000 (equivalent to $5 million in 2023).

[8][9] The newest part of the school, the science wing, was completed in 2001 and contains 15 laboratory classrooms, three computer labs and a new industrial arts center.

Due to their proximity to the Ho-Ho-Kus Brook, the school's fields often flood during heavy rains and spring runoff.

[23] The school was ranked 273rd in the nation and 25th 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.

An alumnus of Williams College and Harvard Graduate School, Kirtane was recognized along with three other teachers from across the state.

[citation needed] In 2015, Ridgewood's Varsity History Bowl finished tied for ninth place at the National Championships.

[26] The Ridgewood High School Maroons[3] 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.

[35] The 1952 team defeated Summit High School in the semifinals and moved on to beat Montclair 3-0 in the finals to win the overall state tennis title and finish the season undefeated.

[36] In 2007, the boys' tennis team won their second state sectionals title in three years, defeating Livingston High School 3-2 to win the North I, Group IV championship.

[37] The 2008 boys' tennis Team won their third consecutive North I, Group IV state sectional championship with a 4–1 win in the tournament final over Livingston High School.

[38] In 2009, the Maroons defeated Bergen Tech 4-1 at Paramus High School for their fourth consecutive North I Group IV state sectional championship.

[40] The football team was awarded the sectional championship by the New Jersey State Interscholastic Athletic Association in 1960 (as co-champion).

[43][44] In 2003, the football team defeated Morristown High School by a score of 35–6 in the NJSIAA North I Group IV title game at Giants Stadium.

[46] The team defeated Passaic County Technical Institute in 2016 to win the North I, Group V state sectional championship by a score of 14–13, finishing the season undefeated for the first time since 1957, with a 12–0 record.

[47] In 2018, the team won their second North II Group V title with a 27–7 win against Montclair High School in the sectional finals.

[51] The 1983 team finished the season with a 29–0 record after winning the Group IV title with a 7–0 victory against Cherry Hill West in the championship game.

[65] Notable runners in previous years include Joe Lemay, who went on to represent the United States at the World Half Marathon Championships and the World Cross-Country Championships, and Bob Keino (son of Kenyan Olympian Kip Keino), who won the New Jersey State Meet of Champions in both 1992 and 1993.

[64] Taro Shigenobu qualified for the Nike Cross Nationals in 2008, and was recognized by The Record as its runner of the year in 2009 and as part of its All-Decade team in 2010, joining Michael Cator, Byron Williams and Ari Zamir on its list of top Bergen County runners.

[65] In 2017, the Ridgewood Boys won their first Bergen Meet of Champions title since 2005 under coach Patrick Ryan, defeating Northern Valley Regional High School at Demarest, 88-94.

[66] The girls' basketball team won the Group IV state championship in 1991 with a win against Piscataway High School in the final game of the tournament.

[68] In 2007, the girls' indoor track and field were North I, Group IV state sectional champions, edging out East Orange Campus High School.

The use of method books and exercises is supplemented by appropriate concert selections (Level 2.5 to 3), and these skills are developed in an enjoyable environment.

[86] As of the 2020–21 school year Ridgewood High was 66% White, 18% Asian, 10% Hispanic, 1% Black, 0.1% Hawaiian Native/Pacific Islander, and 0% American Indian/Alaskan Native.