Los Osos High

Los Osos High

Public High School | Grade 9-12
6001 Milliken Ave,  Rancho Cucamonga, CA
Chaffey Joint Union High School District
3.9
4.6
2,867 Students
A
Niche Grade

School Details

Head of School
Susan Petrocelli
Student Teacher Ratio
25:1
Average SAT Score
1250
Average ACT Score
28
Math Proficiency
52%
Reading Proficiency
81%
Average GPA
3.62
Graduation Rate
95%

Niche Grade

A
Academics
A
Teachers
A
College Prep
B
Administration
B-
Resources/Facilities
B
Clubs and Activities
B-
Sports
B
Food
Source: Niche
Niche Grades

Niche grades and rankings are calculated using dozens of public data sets and millions of reviews. Niche data scientists and user researchers rigorously analyze data and user opinions to assess the key aspects of K-12 Schools, Colleges, and Places to Live. Every month, millions of students and families use the Niche grades and report cards to find the right school or neighborhood.

Niche Grade Details

Academics
Average GPA
3.62
Reading Proficiency
81%
Math Proficiency
52%
Teachers
Student Teacher Ratio
25:1
Teachers
111
Full Time Teachers
111
Teachers in First or Second Year
9.7%
College Prep
Average SAT
1250
Math
630
Verbal
620
Average ACT
28
Math
28
English
28
Reading
29
Science
27
Number of AP Courses
17
AP Pass Rate
72.7%
AP Math Enrollment
High
AP Science Enrollment
Very High
Other AP Enrollment
Very Low
Clubs and Activities
Girls Athletic Participation
Low
Boys Athletic Participation
Low

GreatSchools Rating

Source: GreatSchools
GreatSchools Rating
The GreatSchools Rating helps parents compare schools within a state based on a variety of school quality indicators and provides a helpful picture of how effectively each school serves all of its students. Ratings are on a scale of 1 (below average) to 10 (above average) and can include test scores, college readiness, academic progress, advanced courses, equity, discipline and attendance data. We also advise parents to visit schools, consider other information on school performance and programs, and consider family needs as part of the school selection process.
View GreatSchools Rating Methodology

GreatSchools Rating Details

Test Scores

Math
27.5%
State Average
17.9%
Science
15.2%
State Average
9.9%
GreatSchools Test Scores Rating
GreatSchools
The Test Score Rating reflects annual state test results for this school compared with scores statewide.

Teachers and Staff

Students Per Counselor
422:1

Student Diversity

Male
51.1%
Female
48.9%
Hispanic
39.4%
White
28%
Asian or Pacific Islander
22.3%
Black
6.3%
Two or more races
3.4%
Native American
<1%
Native Hawaiian or Other Pacific Islander
<1%

School Rankings

#150 Best Public HS in California
#173 Best College Prep Public HS in California
Source: Niche

Specialty School Programs

AP Programs Offered
Free/Reduced Lunch Offered
Athletics Program

Colleges Students are Considering

Students are most interested in or go on to attend these colleges.
University of California - Los Angeles 708 Students
University of California - Irvine 602 Students
University of California - San Diego 560 Students
University of California - Berkeley 458 Students
University of Southern California 425 Students
San Diego State University 382 Students
University of California - Riverside 330 Students
University of California - Santa Barbara 313 Students
California State Polytechnic University - Pomona 311 Students
University of California - Davis 286 Students

What Students Want to Study

Niche users from this school are most interested in the following majors.
Biology 298 Students
Psychology 272 Students
Business 243 Students
Nursing 176 Students
Computer Science 151 Students
Pre-Medicine Studies 107 Students
Political Science and Government 88 Students
Kinesiology and Exercise Science 79 Students
Biochemistry and Molecular Biology 61 Students
Criminology 58 Students

This School’s Reviews

Niche Reviews
3.9 771 Reviews
4.0 Alum
3/8/2025
My experience was pretty great, I was in cheer and Track and Field I think that was my best experience, although my worst would have to be the no prom or actual graduation because I graduated in 2020 and that was when COVID hit. One thing I would like to see change is have the students be ready for college.
4.0 Alum
6/7/2024
My experience at Los Osos was overall a good one. I was heavily involved in one of the many leadership programs at the school as well as the soccer program. Although I wasn't involved in clubs the school would hold a yearly club rush allowing students to view and join the variety of clubs at the school. I was also focused on my academics and can proudly say that I have always left my honors and AP classes prepared. Although there were times when regular classes had left me unprepared it varies on the teacher. Overall though academics are highly regarded in the school and there are also many non-academic events to enjoy throughout the year.
5.0 Senior
12/8/2023
My overall experience at Los Osos has bee the best, I couldn't ask for a better school to attend. Los Osos has given me so many opportunities to move on to the next step, Osos has prepared and guided me through my college process. This community is like a second family and home to me.
GreatSchools Reviews
4.6 32 Reviews
5.0 parent
4/21/2019
My children were well prepared to go to top colleges. One of my kids enrolled in Stanford, the other at UC Davis and my friends kids went to UCLA and UC Irvine last year. So very well prepared and this school has the most taking AP classes and passing the AP tests. Many kids come in from other schoo...
5.0 parent
2/9/2019
I could not have picked a better school for my children. I have had three attend Los Osos and all 3 have had happy and healthy experiences here! What more can a parent ask for?
2.0 parent
6/15/2017
I found this school not to be supportive.counselors are negative and did not support our goals. Did not have experience to guide child to a ivy league
1.0 student
11/29/2016
Staff only cares about the progression of themselves and not the students

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Los Osos High is a public school for students in grades 9-12 in Rancho Cucamonga, CA and is served by the Chaffey Joint Union High School District in California. The school has a total enrollment of 2,867 and maintains a student-teacher ratio of 25:1. Academic records show that 52% of students achieve proficiency in math, and 81% are proficient in reading. Los Osos High has received feedback and ratings, with a Niche grade of A and a GreatSchools Rating of 9 out of 10. The average GPA is 3.62, the graduation rate is 95%, and average standardized test scores include an SAT score of 1250 and an ACT score of 28. The average home value in this area is $1,151,725. Discover additional schools in the area, like Rancho Cucamonga High School, Etiwanda High, Alta Loma High, and more. Learn more about what Rancho Cucamonga has to offer, and browse homes for sale and for rent near Los Osos High.

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