Los Osos High
High Schools (Public)Grades 9–12Active
6001 Milliken Avenue, Rancho Cucamonga, CA 91737-7709
(909) 477-6900
Overall Score (2024-25)
↓ 0.4 ptsvs 2023-2474
out of 100
StrongTop 16% statewideData completeness: 100%
Academic Achievement91
CA avg
Academic Growth44
CA avg
Equity83
CA avg
School Climate53
CA avg
College/Career Readiness87
CA avg
Score reflects percentile ranking among same-type schools. How is this calculated?
Test Scores (2024-25)
Percentage of students meeting or exceeding standards on CAASPP/CAST.
English Language Arts79.0%
CA avg 48.8%
Mathematics50.9%
CA avg 34.6%
Science / CAST (2024-25)37.9%
CA avg 32.7%
By Grade
| Grade | ELA % | Math % | Science % | Tested |
|---|---|---|---|---|
| 11 | 79.0% | 50.9% | — | 624 |
Enrollment & Demographics (2024-25)
2,759
Total Students
43.7%
Free/Reduced Lunch
3.0%
English Learners
Staff (2024-25)
25.8:1
Pupil-Teacher Ratio
Graduation Rates (2024-25)
↑ 0.8%96.3%
Graduation Rate
77.8%
Met UC/CSU Reqs
2.6%
Dropout Rate
Chronic Absenteeism (2024-25)
↑ 9.0%25.0%
Chronically Absent
2,807
Students Tracked
Historical Trends
Year-over-year performance data from official CDE records.
Composite Score
ELA Proficiency %
Math Proficiency %
Science / CAST %
Graduation Rate %
Chronic Absenteeism Rate %
Total Enrollment
Parent & Community Reviews
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Data sourced from the California Department of Education. CDS Code: 36676523631058. Academic Year: 2023-24 – 2024-25.