CAHighVerified for 2025-26

Los Osos High School Calendar 2025-26

High|Rancho Cucamonga, California|Chaffey Joint Union High|Last audited: Not yet synced

Rancho Cucamonga, CA 91737

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School Profile

Grades
9–12
Enrollment
2,759
Student:Teacher
25.1:1
Locale
Suburban
Econ. Disadvantaged
34.4%

School Statistics

Academics (SY 2020-21)

ELA Proficiency
77%
90th percentile in CA
Math Proficiency
64%
89th percentile in CA
Graduation Rate
95%

Programs & Activities (SY 2021-22)

AP Program
17 courses offered
Gifted & Talented
Dual Enrollment
Athletics
4 sports offered
Student-Teacher Ratio: 24.4:1
Worse than average in CA

District Finance (FY 2023)

Per-Pupil Spending
$16,769
District-level data
Funding Sources
Federal 8%State 58%Local 35%

Community Context

Median Home Value
$580,340
-1.9% YoY
Riverside, CA metro area · Zillow Feb 2026
Community Need Level
Elevated
CDC/ATSDR Social Vulnerability Index 2022

Enrollment Trend (2014-2025)

2,759
Current enrollment
Stable(-7% 5yr)

Full School Calendar 2025-26

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Frequently Asked Questions about Los Osos High

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