Los Osos High

6001 Milliken Ave.
Rancho Cucamonga, CA 91737

www.cjuhsd.net

2,759 Students

High School 9th - 12th

School Overview

Los Osos High School, located in Rancho Cucamonga, California, is a prominent comprehensive public high school serving the Chaffey Joint Union High School District. Established in 2002, the school serves a large, diverse student body and is well-regarded for its commitment to academic excellence, athletics, and extracurricular engagement. The campus is designed with modern facilities that support a wide range of educational programs, including rigorous Advanced Placement (AP) courses, career technical education, and specialized pathways intended to prepare students for both collegiate and professional futures.

Beyond its academic curriculum, Los Osos High is widely recognized for its vibrant school culture and competitive spirit. The "Grizzlies" maintain a strong reputation in Southern California high school athletics and offer numerous student-led clubs, performing arts programs, and service organizations. By fostering a collaborative environment between staff, students, and the local community, the school aims to cultivate well-rounded individuals who are equipped with the critical thinking and leadership skills necessary for success in a global society.

2,759

Total Students

107.1

Full-Time Teachers

25.8

Student/Teacher Ratio

43.7%

Free/Reduced Lunch

Student Demographics

Student Demographics Data Table

Student Demographics for Los Osos High
Demographic	Student Count
White	674
Hispanic	1,142
Black	164
Asian	633
Two or More	135
American Indian	7
Pacific Islander	3

Hispanic
1,142 (41.4%)
White
674 (24.4%)
Asian
633 (23.0%)
Black
164 (5.9%)
Two or More
135 (4.9%)
American Indian
7 (0.3%)
Pacific Islander
3 (0.1%)

School Location

School Details

Status:	Open
School Level:	High School
School Type:	Regular School
Charter Status:*	Public Non-Charter
Virtual Instruction:	Supplemental Virtual
Shared Time Status:	N/A
District:	Chaffey Joint Union High
Phone:	(909)477-6900
Website:	http://www.cjuhsd.net
Grade Range:	9th - 12th
Total Students:	2,759
Full-Time Teachers (FTE):	107.1
Pupil/Teacher Ratio:	25.8
NSLP Participation:¹	Yes under Community Eligibility Option (CEO)
Qualified Free Lunch:	833
Qualified Reduced Lunch:	373

* Charter Schools: A public charter school is a publicly funded school that operates independently under a legislative contract (or "charter") with a state, school district, or designated authorizing entity. Charters grant these schools greater operational flexibility over curriculum, staffing, and budgeting in exchange for strict accountability to achieve performance standards established in their charter agreement.

¹ National School Lunch Program (NSLP): The National School Lunch Program is a federally assisted meal program operating in public and nonprofit private schools. It provides nutritionally balanced, low-cost or free lunches to eligible children each school day based on household income thresholds or community eligibility options (CEO).

Title I Program Overview: Title I, Part A of the Elementary and Secondary Education Act (ESEA) allocates federal financial assistance to local educational agencies and public schools with high percentages of children from low-income families to help ensure that all children meet challenging state academic standards.

Grades Taught

Grade 9 721

Grade 10 655

Grade 11 685

Grade 12 698