2025 California state test results
Diamond Bar, California school test scores and rankings
Across 11 public schools with results, the median reading proficiency was 72.4% and the median math proficiency was 70.5%. The median combined result ranked at the 88th percentile among comparable California schools.
Located in Los Angeles County.
Schools with scores
11
Students represented
8,396
Median school percentile
88th
Schools improving
4
Schools declining
6
Schools
Rank combines reading and math standing among comparable California schools. CA Percentile shows that combined statewide standing. Select any header to sort.
| 1 | Chaparral Middle | Middle | Walnut Valley Unified | 24.8% | No | 82.8% | 80.3% | 98th |
| 2 | Maple Hill Elementary | Elementary | Walnut Valley Unified | 27.3% | No | 82.5% | 82.9% | 97th |
| 3 | Quail Summit Elementary | Elementary | Walnut Valley Unified | 25.0% | No | 76.7% | 81.9% | 94th |
| 4 | Pantera Elementary | Elementary | Pomona Unified | 47.9% | No | 81.4% | 74.5% | 93rd |
| 5 | Diamond Bar High | High | Walnut Valley Unified | 22.8% | No | 76.3% | 68.3% | 93rd |
| 6 | Evergreen Elementary | Elementary | Walnut Valley Unified | 26.0% | No | 72.4% | 71.6% | 88th |
| 7 | Castle Rock Elementary | Elementary | Walnut Valley Unified | 26.6% | No | 71.2% | 70.5% | 87th |
| 8 | Golden Springs Elementary | Elementary | Pomona Unified | 72.2% | No | 59.8% | 38.5% | 63rd |
| 9 | Lorbeer Middle | Middle | Pomona Unified | 74.3% | No | 47.4% | 30.6% | 56th |
| 10 | Diamond Point Elementary | Elementary | Pomona Unified | 0.0% | No | 44.9% | 31.4% | 53rd |
| 11 | Armstrong Elementary | Elementary | Pomona Unified | 67.3% | No | 47.4% | 29.3% | 46th |
Highest-ranked schools by level
Elementary schools
- 1Maple Hill Elementary
97th percentile
- 2Quail Summit Elementary
94th percentile
- 3Pantera Elementary
93rd percentile
- 4Evergreen Elementary
88th percentile
- 5Castle Rock Elementary
87th percentile
Middle schools
- 1Chaparral Middle
98th percentile
- 2Lorbeer Middle
56th percentile
High schools
- 1Diamond Bar High
93rd percentile
Districts serving local schools
District scores cover the entire district, including schools outside this place when district boundaries cross city lines. Select any header to sort.
| 1 | Walnut Valley Unified 14 schools districtwide | 76.2% | 72.8% | 95th |
| 2 | Pomona Unified 41 schools districtwide | 37.3% | 24.0% | 33rd |
Other cities in Los Angeles County
How these rankings work
Rankings use the latest available California reading and math results. Schools are compared with other California schools serving similar grade levels. Medians describe the typical local result and are not districtwide averages. Virtual schools are excluded, and cities with fewer than three scored schools are omitted from the indexed location directory.