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Email BoardDiamond Ranch High
100 Diamond Ranch Drive, Pomona, CA 91766-4723
Summary
Reading and math results average to the 72nd percentile among comparable California schools.
67.9% of students met California's reading standard, and it is trending up slightly.
Math is weaker: 30.6% of students met California's math standard, but it is slowly trending up.
Proficiency stats
| Current Reading Proficiency | 67.9% |
| Current Math Proficiency | 30.6% |
| Reading State Rank | 375/1,596 (77th percentile) |
| Math State Rank | 526/1,596 (67th percentile) |
School information
| Student / Teacher Ratio | 23:1 |
| Student enrollment (2024–25) | 1,542 |
| Low-Income Students | 1,213 (78.7%) |
| English Learners | 130 (8.4%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading was unchanged from last year and rose 1.9 points over the full period. Math rose 4.3 points from last year and rose 5.0 points over the full period.
•Math +5.0 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Most students in every reported group meet the reading standard. Asian and Hispanic or Latino students have the strongest results.
Distribution of Scores by Grade
67.9% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank in the top 24% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 13.2-point reading income gap is narrower than the 14.7-point gap at a typical California 9–12 school. It narrowed over the period shown.
•
English Learners vs English Native
15.0% of English learners meet the reading standard, compared with 74.3% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Asian students have the strongest math results at about 74% proficiency. The other reported groups range from about 24% to 24%.
Distribution of Scores by Grade
30.6% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank in the top 33% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 11.6-point math income gap is narrower than the 14.2-point gap at a typical California 9–12 school. It narrowed over the period shown.
•English Learners vs English Native
20.0% of English learners meet the math standard, compared with 32.2% of English-only students. The gap narrowed as English-learner results rose and English-only results rose.
•How we compare income gaps
“Typical” means the median gap across 876 schools for reading and 882 for math. The comparison uses 2026 California 9–12 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Diamond Ranch High compare within the district?
Diamond Ranch High is No. 2 in reading and No. 3 in math proficiency among the 5 9–12 schools in Pomona Unified with 2026 results.
Explore the district’s schoolsHow does Diamond Ranch High rank in California?
Diamond Ranch High ranks No. 375 of 1,596 in reading and No. 526 of 1,596 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Diamond Ranch High compare within the district?
Low-income students here rank No. 2 in reading and No. 3 in math among 5 9–12 district schools with reportable 2026 results for this group. 65.3% meet the reading standard and 28.4% meet the math standard.
See results by student groupHow does Diamond Ranch High compare with other schools in Pomona?
Diamond Ranch High is No. 3 in reading and No. 4 in math proficiency among the 6 9–12 schools in Pomona with 2026 results.
Explore schools in PomonaHow does Diamond Ranch High compare with other schools in Los Angeles County?
Diamond Ranch High is No. 107 in reading and No. 133 in math proficiency among the 334 9–12 schools in Los Angeles County with 2026 results.
Explore schools in Los Angeles CountyWhich schools should I compare?
Schools serving 9–12 in the same district.
| School | Math | Reading |
|---|---|---|
| Diamond Ranch HighThis school | 30.6% | 67.9% |
| Ganesha High | 26.1% | 42.5% |
| Garey High | 35.5% | 61.1% |
