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Ontario High School
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(909) 460-5832

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Hello Jaguar Family!

We are near the end of the school year and our students will take their finals very soon!  We will have our graduation ceremony in our beautiful Jaguar Stadium on May 22 at 6:30 p.m.

As students prepare for finals, we will continue to have after school tutoring and the library is open until 4:30, Monday-Thursday.  Our cafeteria also provides a snack to students who attend tutoring!

Please see the finals schedule on this page and keep in mind that we dismiss early on May 21, 22, and 23., school will end at 11:50 a.m. on those days.

I want to thank you for supporting our school and most importantly for supporting your son/daughter.  Our students have accomplished a lot this school year, and I am certain that they will properly prepare for their final exams.  

Have a great summer and we will see you on the first day of school, August 8th!  Congratulations to the class of 2018, we are proud of you!

It is an honor to be your principal!

Mr. Zaldivar

Twitter @OntarioHS


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All Ontario High School students will graduate ready for college and careers.

Week At A Glance

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Jaguars, Ontario High School is excited to provide the extended learning opportunities listed below. Please attend the free tutoring sessions and the Saturday RISE sessions in order to increase your achievement and maximize your academic potential. Go Jags!

Go Jaguars!


Mr. Zaldivar, Principal

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Dream Act

School Accountability Report Card

2016-2017 - English
2016-2017 - Spanish

A hard copy of our SARC Report is available in the main office.

Hey Ontario.....


The Chaffey Joint Union High School District has partnered with School Loop. School Loop is an innovative communication tool designed to keep parents, students, teachers and staff connected. With School Loop parents and students can:

  •  Check assignments online
  •  Monitor current grades
  •  Email teachers/counselors
  •  View school news/events
  •  Submit work electronically

Every Chaffey District parent and student is encouraged to register. It takes less than two minutes to sign up and all accounts are FREE! Click the 'Register Now' tab on the top left of this page.