Ontario High School

Bell Schedule

Community Rights

Food Services

Parents

Students

Transcripts

We’re glad you’re here

Comprehensive Professional Learning

Ontario High School prioritizes cultural proficiency, self-reflection, and innovative research-based instructional practices, utilizing technology and resources to achieve equitable outcomes among all student groups.

Safe and Caring Learning Environment

Ontario High School promotes and fosters student engagement, social-emotional well-being, diversity, equity, and inclusion.

Effective Communication

Ontario High School will provide family and community engagement opportunities, and strengthen relationships with all educational partners.

Upcoming Events

View the full calendar to see all the exciting events we have happening in the next few weeks and months!

View Full Calendar

Latest News

Stay up to date on exciting news, events and more with the ParentSquare app!

March 11, 2026

Welcome to ParentSquare!

Our school is using ParentSquare! We are excited to let you know that this year we'll be using ParentSquare to communicate with you at the school, and in your classrooms and groups. ParentSquare pr...

March 11, 2026

Step 1: Activate Your Account

Click the link in your activation email/text, or sign up on parentsquare.com or via the ParentSquare app.Next, check out our guide to getting started.

March 11, 2026

Step 2: Download the App

It’s easy to stay in the loop with the ParentSquare app. Download it now for iOS or Android devices. Register for ParentSquare from the Mobile App Parent Dashboard on Mobile App

March 11, 2026

Step 3: Set Preferences

Click your name in the top right to set your notification and language preferences. More tips

Principal's Message

Man smiling with dark hair wearing eyeglasses in a dark suit with red tie

Dear Ontario Students and Parents,

As we enter the fourth quarter, it’s incredible to see how far we’ve come this year! I want to take a moment to encourage all students to finish strong, you have worked hard, and we are so proud of your efforts and achievements.

After Spring Break, we will enter an important time of the year: academic testing season. This includes the administration of the Smarter Balanced Assessment Consortium (SBAC) and Advanced Placement (AP) Exams. Our students and staff have been diligently preparing, and I am confident that their hard work will pay off. These assessments are important indicators used by the state to measure our school’s overall success, and I know our Jaguars will rise to the challenge!

Stay Focused & Prepareds

Our students have been working hard, and our teachers are committed to ensuring they are well-prepared for these exams. Stay determined, stay focused, and give it your best!

Thank you for your continued dedication and support. Let’s finish the year strong, Jaguars!

Larry Rook
Principal, Ontario High School

Ontario District Facts

56%

of Ontario High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.