Colony High
High Schools (Public)Grades 9–12Active
3850 East Riverside Drive, Ontario, CA 91761-2603
(909) 930-2929
Overall Score (2024-25)
↓ 2.2 ptsvs 2023-2454
out of 100
AverageTop 45% statewideData completeness: 100%
Academic Achievement54
CA avg
Academic Growth55
CA avg
Equity57
CA avg
School Climate39
CA avg
College/Career Readiness63
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 Arts53.7%
CA avg 48.8%
Mathematics20.9%
CA avg 34.6%
Science / CAST (2024-25)24.3%
CA avg 32.7%
By Grade
| Grade | ELA % | Math % | Science % | Tested |
|---|---|---|---|---|
| 11 | 53.7% | 20.9% | — | 482 |
Enrollment & Demographics (2024-25)
2,109
Total Students
69.7%
Free/Reduced Lunch
9.1%
English Learners
Staff (2024-25)
26.0:1
Pupil-Teacher Ratio
Graduation Rates (2024-25)
↓ 2.6%88.8%
Graduation Rate
64.8%
Met UC/CSU Reqs
10.1%
Dropout Rate
Chronic Absenteeism (2024-25)
↑ 8.1%31.4%
Chronically Absent
2,190
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: 36676523631157. Academic Year: 2023-24 – 2024-25.