Los Osos High

6001 Milliken Ave.
Rancho Cucamonga, CA 91737

www.cjuhsd.net

2,837 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.

2,837

Total Students

114.5

Full-Time Teachers

24.8

Student/Teacher Ratio

42.5%

Free/Reduced Lunch

Student Demographics

Student Demographics Data Table

Student Demographics for Los Osos High
Demographic	Student Count
White	794
Hispanic	1,117
Black	178
Asian	632
Two or More	96
American Indian	13
Pacific Islander	6

Hispanic
1,117 (39.4 %)
White
794 (28.0 %)
Asian
632 (22.3 %)
Black
178 (6.3 %)
Two or More
96 (3.4 %)
American Indian
13 (0.5 %)
Pacific Islander
6 (0.2 %)

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:	2,837
Full-Time Teachers (FTE):	114.5
Pupil/Teacher Ratio:	24.8
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 9 688

Grade 10 713

Grade 11 742

Grade 12 694