Schools in 91765 — Diamond Bar, California: 91765 students aren't just reaching proficiency — many go beyond it.
91765 has 9 ranked schools in Diamond Bar, averaging a Scope Score of 65.9/100 — 25.4 points above the state average of 40.5 (a state average weighted to 91765's own mix of school levels; CDE CAASPP 2025). Scores range from 35.1 to 85.5, a 50.4-point spread. 7 schools rank in the 90th percentile or above statewide.
How 91765 schools perform
The top-ranked school is Chaparral Middle with a Scope Score of 85 and 58.3% of students exceeding standard.
Students here are going past the bar, not just to it. Schools here average 44.5% exceeding standard — well above the statewide average of 20.7%, itself weighted to 91765's own level mix.
Cohort growth among 91765's elementary schools — the returning cohort, 2023 G3 → 2025 G5 — averages +77 scale-score points across 6 schools in 91765 with a large enough tested cohort. Scale scores rise with grade for nearly every school, so this describes the cohort's trajectory, not a ranking against other zip codes — worth examining school by school.
Chronic absenteeism across 91765 averages 9.0%, below the state average of 18.5%, weighted to 91765's own level mix. CDE CAASPP 2025.
How 91765 compares to nearby zip codes
| Zip | City | Miles | Schools | Avg Score | vs 91765 |
|---|---|---|---|---|---|
| 91765 | Diamond Bar | — | 9 | 65.9/100 | — |
| 91789 | Walnut | 2.6 | 10 | 64.8/100 | -1.1 |
| 91766 | Pomona | 4.3 | 14 | 32.3/100 | -33.6 |
| 91748 | Rowland Heights | 4.4 | 6 | 42.4/100 | -23.6 |
| 91768 | Pomona | 4.9 | 6 | 29.5/100 | -36.4 |
| 91709 | Chino Hills | 5.7 | 12 | 64.0/100 | -1.9 |
Source: CDE CAASPP 2025, analyzed by SchoolScope.
School archetypes in 91765
Hidden gems: 2 schools in 91765 are classified as Growth Engine (2) — showing positive growth trajectories that raw proficiency scores alone don't capture. These are schools where students leave with more than they arrived with.
Archetypes are data-driven labels based on Scope Score dimensions. Learn more
All schools in 91765
ranked by Scope Score · 2024–25 CAASPP
Elementary Schools (7)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Maple Hill Elementary Walnut Valley Unified High Ceiling | 60.6% | Strong 76/100 |
| 2 | Pantera Elementary Pomona Unified High Ceiling | 52.6% | Strong 75/100 |
| 3 | Evergreen Elementary Walnut Valley Unified Growth Engine | 47.2% | Strong 69/100 |
| 4 | Quail Summit Elementary Walnut Valley Unified Building Momentum | 52.3% | Strong 67/100 |
| 5 | Castle Rock Elementary Walnut Valley Unified Growth Engine | 42.9% | Strong 65/100 |
| 6 | Armstrong Elementary Pomona Unified Building Momentum | 21.4% | Solid 39/100 |
| 7 | Golden Springs Elementary Pomona Unified Building Momentum | 18.7% | Developing 35/100 |
Middle Schools (1)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Chaparral Middle Walnut Valley Unified High Ceiling | 58.3% | Strong 85/100 |
High Schools (1)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Diamond Bar High Walnut Valley Unified Strong All-Around | 46.3% | Strong 82/100 |
Schools in 91765 on the map
Data source: California Department of Education · CAASPP 2024-25 · Methodology
Scores are SchoolScope's analysis of public data, not official CDE ratings. They represent one way of interpreting test results and should not be the sole basis for school decisions.
Numbers tell you whether students are clearing the bar. A school visit tells you whether they're happy doing it. These metrics are intentionally missing from the Scope Score: class sizes and student-teacher interaction quality; arts, music, athletics, and enrichment programs; teacher experience and turnover; campus safety and social-emotional support; parent and community engagement; quality of special education and gifted programs; how school zones and enrollment boundaries affect access. Full methodology