Los Osos High
Rancho Cucamonga, CA · Chaffey Joint Union High · Grades 9-12
162nd of 1,528 California high schools statewide · better than 89%· Stable
Los Osos High ranking
SchoolRow ranks Los Osos High 162nd of 1,528 California high schools for 2024–25, based on CAASPP 2024–25 English and Math results — better than 89% of high schools statewide. Its statewide percentile went from 87th in 2015 to 89th in 2025.
Los Osos High test scores
Percent meeting or exceeding the state standard, CAASPP 2024–25 · 636 students tested
Los Osos High students
Racial and ethnic breakdown of 2,759 students (2023–24, NCES) — and how it has shifted since 2013
| Group | Trend | 2013 | 2023 | Change |
|---|---|---|---|---|
| Hispanic | 33.6% | 40.7% | ▲ 7.1 pts | |
| White | 40.3% | 27.1% | ▼ 13.2 pts | |
| Asian | 13.7% | 22.0% | ▲ 8.3 pts | |
| Black | 10.0% | 6.0% | ▼ 4.0 pts | |
| Two or more races | 1.9% | 3.7% | ▲ 1.8 pts |
Homes near Los Osos High
Typical home value $958K in zip 91737 as of 2026-05 · trend since 2000
Data Provided by Zillow Group
High schools near Los Osos High
Closest same-level schools, with 2024–25 state rank
- 9Rancho Cucamonga HighChaffey Joint Union High · 0.9 mi away256th of 1,528
ELA 75% · Math 43% - 9Etiwanda HighChaffey Joint Union High · 2.9 mi away175th of 1,528
ELA 81% · Math 46% - 8Alta Loma HighChaffey Joint Union High · 3.4 mi away359th of 1,528
ELA 72% · Math 33% - –Chaffey Community DayChaffey Joint Union High · 4.9 mi away
- –Chaffey District Online HighChaffey Joint Union High · 5 mi away
- 1Valley View High (Continuation)Chaffey Joint Union High · 5.1 mi away1,379th of 1,528
ELA 11% · Math 3% - 8Summit HighFontana Unified · 5.3 mi away320th of 1,528
ELA 76% · Math 35% - 8Upland HighUpland Unified · 6.2 mi away394th of 1,528
ELA 66% · Math 37%
Frequently asked questions
What school district is Los Osos High in?
Los Osos High is part of the Chaffey Joint Union High district in Rancho Cucamonga, California.
Is Los Osos High a good school?
SchoolRow ranks Los Osos High 162nd of 1,528 California high schools (better than 89% statewide) based on 2024–25 test results (CAASPP 2024–25).
What is the racial makeup of Los Osos High?
Hispanic 41%, White 27%, Asian 22%, Black 6% (2,759 students, 2023–24).
How much do homes near Los Osos High cost?
The typical home value in zip code 91737 is $958K as of 2026-05 (Zillow ZHVI).
Sources: state education department data (CAASPP 2024–25, low-income, chronic absenteeism), National Center for Education Statistics via the Urban Institute (enrollment, demographics, staffing), Zillow Group (home values). Rankings are computed by SchoolRow from state English and Math results within grade level; they measure test performance, not everything that makes a school good.