Norco High School is a comprehensive public high school serving over 2,000 students from grades 9-12 in Norco, California, United States.

It is part of the Corona-Norco Unified School District.

[2] The current principal is Melissa Bako.

[1] As of the 2020–21 school year, the enrollment by race/ethnicity is:[2] Norco High School has multiple clubs and student organizations, including an Mock Trial, AFJROTC, Alpha Omega Bible Club, American Cancer Society, Art Club, ASB, Cougar Buddies, Cougar Chronicle, Dance, the Blue Diamond Brigade marching band, Friday Night Live, FBLA(Future Business Leaders of America), History Club, Humanitarian Club, Link Crew, Key Club, Unity, Yearbook, Competitive Show Choir / Choral Choir, Book Club, and FFA (Future Farmers of America).

The April 19, 2007 performance of Invincible Summer at the American Repertory Theater in Cambridge, Massachusetts, was disrupted when 87 audience members from Norco High School left the production mid-performance, with one school chaperone approaching the stage and pouring water over the performer's outline notes.