School Overview


6001 Milliken Ave

Rancho Cucamonga, CA 91737

(909) 477-6900

School Website

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Grades: 9 - 12

School Type: Public

Student Enrollment: 3,224

Students Per Teacher: 26

Parent Reviews

51 Parent Reviews for Los Osos High School

The counselor has been very helpful in choosing classes my child is interested in. The technology program is current, with all new computers and software. The principal really administrates this school effectively. It is safe and there are zero "gangs" which can be find in other neighboring areas.

Posted by a parent on 06/23/14

We took a tour of the school and love the people and the location here in Rancho Cucamonga. We just moved to this area and are looking forward to great things for our children.

Posted by a other on 06/07/14

Los Osos is an amazing school! I wasn't as motivated freshman year to do so good, But my teachers did everything they could to help me. They are very flexible and are willing to do whatever it takes to make sure you pass. Also the best High School in San Bernadino County!

Posted by a other on 11/06/13

Los Osos High School. Let me just say first off, it is the best high school in Southern California. Everything, and i mean everything is perfect about LOHS. It surpasses Rancho Cucamonga High School as well as the rest! With the outstanding principle, Mrs. Petrocheli , This is still the top school.Also ...  Read more

Posted by a student on 08/20/13

Love this school transferred to public school for the first time as a freshman and I loved it people are so much nicer here, the academics are amazing. It's a incredible school that offers so much. I am so happy I am at this school. No complaints at all (: people are welcoming classes are great and teachers ...  Read more

Posted by a other on 08/16/13

Great ACADEMIC program and reputation. Teachers I have interacted with show genuine concern for the success of all students through professionalism and upright character. Lots of school spirit and the office staff has always been friendly and helpful.

Posted by a parent on 04/29/13

Excellent opportunities for classes, great teachers, and a wonderful staff. Best high school in the Inland Empire.

Posted by a parent on 10/25/12

I'm currently a junior here, and I love the school, it's very nice and runs smooth. I love all the academic classes provided, and the teachers are great!

Posted by a student on 02/29/12

I really like this school because my daughter is highly motivated to excel and she hasn't been motivated for a few years. She is excited to go to school and do well. They accept all students who are gifted choose whether or not they want to take honors classes and will add them if necessary to help ...  Read more

Posted by a parent on 11/09/11

We have a very committed principal at Los Osos High School. The teachers are very responsive and willing to work with you for the good of your children. This is a great school.

Posted by a parent on 07/26/11

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School Profile for Los Osos High School

Test scores
Test scores for Los Osos High School

CST* Test Scores

Grade Level:

Test Year: 2012
Los Osos High School
Chaffey Joint Union High School District
* In 2011-2012 California used the California Standards Tests (CSTs) to test students in English language arts in grades 2 through 11; math in grades 2 through 7; science in grades 5, 8 and 10; and history-social science in grades 8 and 11. Middle and high school students also took subject-specific CSTs in math and science, depending on the course in which they were enrolled. The CSTs are standards-based tests, which means they measure how well students are mastering specific skills defined for each grade by the state of California. The goal is for all students to score at or above proficient on the tests.

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Charts and Data
Rancho Cucamonga schools — Los Osos High School is located at 6001 Milliken Ave, Rancho Cucamonga CA 91737. 6001 Milliken Ave is in the 91737 ZIP code in Rancho Cucamonga, CA The school district for Los Osos High School is the Chaffey Joint Union High School District. Los Osos High School is a Public school that serves grade levels 9 - 12.
School information provided by GreatSchools. Information is deemed reliable but not guaranteed.
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