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About Us

The Chaffey Joint Union High School District serves the communities of Ontario, Montclair, Rancho Cucamonga, and portions of Fontana, Upland, Chino, and Mount Baldy. With over 25,000 students, the District is the fourth largest high school district in California. It has eight comprehensive high schools, a continuation high school, an online high school, a community day school, an adult school, and alternative programs. The District offers a wide variety of instructional options that provide a quality education for each student, every day. The District's well-prepared, dedicated, and highly qualified teachers and support personnel are second to none.
 
The Chaffey Joint Union High School District Board of Trustees are steadfast in the belief that "Nothing is more important than student learning and their achievement."
 
Our daily purpose encompasses our commitment:
"To provide student learning, and ultimately their achievement, of the prescribed curriculum that takes place in the classroom under the direction of the teacher." The Chaffey District supports this daily act. We realize that our efforts uniquely influence the future of our community and of this nation, and we are passionate about doing whatever it takes to prepare students to be successful and contributing citizens of the 21st century.
 
The Chaffey District has provided a quality education for high school students in the area since 1911. As the District continues to grow and progress, we are poised to meet the challenge of providing the finest quality education possible for every student. 
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All CJUHSD students will graduate ready for college and careers.

Recent News

WeTip - Be the solution

WeTip

Be the Solution. If you have information regarding crime or misconduct at your school, call WeTip anonymously.

The Chaffey District Cares

The Chaffey District cares about your mental well-being. We partner with community agencies and mental health professionals to provide support to our students and staff. If you, or someone you know, is in crisis please contact the Community Crisis Response Team (909) 421-9233 - Click 'Read Full Story' for more information.

Upcoming Events

Board Meeting

Time: 5 PM
Location: Montclair High School

School 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.
  • 85% of freshmen at Ontario High School complete their first year of high school on track to graduate.
  • The CJUHSD has been named a Top Workplace by the Press-Enterprise and Inland News Group.
  • 522 Advanced Placement exams are administered to students at Ontario High School annually.

Principal's Message

Larry Rook
Jaguar Families,
I hope you had a restful Thanksgiving break. This year has been an incredible journey so far, and I’m thrilled to see all our students each day at OHS. I am honored and grateful to serve as your principal, and I want to express my appreciation for the Ontario High School community of students, parents, and staff. Together, we continue to build a supportive and strong environment for our students.
 
As we approach the end of the first semester, I want to commend our students for their hard work and perseverance. You’ve all made great strides, and now is the time to focus on finishing strong. I encourage each of you to stay motivated, maintain your momentum, and put forth your best effort in these final weeks. Remember, you are not alone in this journey—our dedicated Ontario staff is here to help you succeed.
 
Students, make sure you take full advantage of the resources available to you. Our Tutoring Program is open Monday through Thursday, and our Saturday RISE sessions on December 7th and December 14th offer additional opportunities to receive academic support. Don’t hesitate to use these services to help you prepare for finals and strengthen your understanding of course material. You can access the tutoring schedule here: bit.ly/OHSTutoring.
 
Our Final Exams will take place from Tuesday, December 17th through Thursday, December 19th. There will be no school on Friday, December 20th. Please review the exam schedule carefully and make sure you’re fully prepared for these important assessments.
 
It is truly a privilege to lead this exceptional school community. I am inspired by the commitment and determination of our students, families, and staff. Wishing everyone a productive and successful end to the semester and a joyful Winter Break!
 
Your Proud Principal,

Mr. Rook