In 2014, an extensive modernization took place with the help of "Measure P", constructing a new campus, a 2 story building, solar panels in the parking lot, and a new stadium in which the school will be able to host its first home football games.

Ontario High School's instrumentalists, percussionists, and color guard performers compete in the Southern California Judging Association (SCJA) circuit for marching season during the first three months of the academic year.

[citation needed] For most of its history, the marching season group was known as the Ontario High School Jaguar Band and Color Guard.

[citation needed] On November 1, 2008 the Ontario High School Pride entered the Surf City Open marching competition and won the highest "sweepstakes" awards and an invitation to the 2nd Annual California State Championship.

This is the first time in its history that the combined marching band, percussion, and color guard competed in a state level competition.

[citation needed] The school's dance classes—Dance Fundamentals, Core 2, Dance production and Dance Company—perform an end-of-the-year show to songs such as Bad Romance by Lady Gaga, Heads Will Roll by the Yeah Yeah Yeahs, Fuego by The Cheetah Girls, We Got the Beat by The Go-Gos, Street Lights by Kanye West, Hush Hush by The Pussycat Dolls, Send Me on My Way by Rusted Root, The Beautiful People by Marilyn Manson, Scars by Kelis, What's This from The Nightmare Before Christmas, and I Took the Night by Chelly.

[citation needed] The school's drama productions are currently directed by University of LaVerne graduate Jessica Larson, M.Ed.

Past performances include Elf: The Musical, The Curious Incident of a Dog in the Nighttime, Little Shop of Horrors, A Midsummer Night's Dream, Seussical: The Musical, The Terror Trilogy, Rumors, To Kill a Mockingbird, The Nerd, Touchtone "M" for Murder, Night of the Living Dead, Alice in Wonderland, Area 51 the Musical, The Brothers Grimm Spectaculathon You're a Good Man, Charlie Brown, The Legend of Sleepy Hollow, and The Complete Works of William Shakespeare Abridged.

[6] Student Enrollment: 2,841[6] Free/Reduced School Lunch: 55.9%[6] Socioeconomic Disadvantaged: 75.8%[6] English Language Learners: 26.4%[6] Census Characterization: Mid-size City[6] Ethnic Breakdown:[6][Note 1] American Indian/Alaskan Native: 0.2% Asian: 2.4% Pacific Islander: 0.4% Filipino: 0.5% Hispanic/Latino: 85.8% African American: 4.2% White: 6.1% Other/Declined to State: 0.5% Student Enrollment: 2,591[7] Free/Reduced School Lunch: 17.3%[7] English Language Learners: 29.8%[7] Census Characterization: Mid-size City[7] Ethnic Breakdown:[7] American Indian/Alaskan Native: 0.3% Asian: 2.7% Pacific Islander: 0.3% Filipino: 0.7% Hispanic/Latino: 77.6% African American: 7.6% White: 10.7% Other/Declined to State: 1.2% Students and faculty members often work together to form clubs that serve the community and participate in extra-curricular activities.