Chaffey High School Home

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


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

School Facts

  • 55% of Chaffey 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 Chaffey 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.
  • 700 Advanced Placement exams are administered to students at Chaffey High School annually.

Principal's Message

Christina Martinez
Dear Chaffey Families,
We’re so close! With Spring Break, Prom, and CAASPP now behind us, the school year is rapidly coming to an end. Final progress reports have been mailed home and we have just a couple of weeks before final exams. It is so important for students to continue working hard and finish the semester strong. Students should assess their progress in each class and communicate with teachers about how to maintain or improve their grades. Also, continue to monitor Canvas and communicate with counselors if you have any concerns.
Seniors, graduation is right around the corner, and we want to see all of you cross the stage at our commencement ceremony in Graber Stadium on Thursday, May 24th. Please check your email, Canvas, and Parent Square for more details and a complete list of senior activities.
Parents and guardians, please continue to help your students by reviewing their progress each day and by ensuring that homework is complete. Also, please help by making sure your student is attending every class, every day. 
Finals will be held on Tuesday- Thursday, May 21-23 (these are minimum days). All students should begin preparing for finals each night by reviewing the content they have learned. The complete final exam schedule can be found on our school’s website at
Summer School will be in session Monday, June 3 to Tuesday, July 2. Registration is now taking place. Contact your student’s counselor if you believe your student will need to attend.
Finally, I would like to thank our Chaffey High School community for your trust and support throughout this school year.  CHS is an amazing school, and I am proud of all that our students and staff have accomplished.
Go Tigers!
Christina Martinez