On March 14, 2018, students walked out to protest gun violence after one month of the school shooting in Parkland, Florida.

[14] Morristown High School provides 285 courses (including Honors and AP) to its students.

Morristown High School also offers "STEM Academy," an enrichment program for students in grades 9-12.

[20] The football team competes in the Freedom Blue 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.

[27] The 1974 team finished the season with a 10-0 record after winning the first North II Group IV sectional title of the playoff era with a 30-10 victory against Bloomfield High School at the championship game played indoors in front of a crowd of 4,500 at Atlantic City Convention Hall.

[28][29] The 1993 team finished the season with a 9-1-1 record after winning the North II Group III title with a 25-0 victory against Morris Knolls High School in the championship game.

[30] The 1998 team won the North II Group III sectional championship by a score of 37-14 over Westfield High School, to finish the season 11-0.

[33] The baseball team won the Group III state championship in 1993 (defeating Steinert High School in the tournament final) and 2006 (vs.

[39] The team won the Public B state championship in 2014, beating Ramsey High School by a score of 1–0 in the tournament final, with the game-winning goal scored with less than a minute left in the game to break a scoreless tie and earn Morristown the program's first championship.

[40] In 2016, the team won their second title, this time in the Public A division, against Randolph High School by a final score of 2–0.

[43] The girls softball team won the Section 1, Group 4 Championship in 2024, against Columbia High School.

[44] The girls basketball team won the North Jersey Group 4, Section 1, title in 2017 and 2024.