Schools in 91766 — Pomona, California: 14 schools. Average score 9.7 points below the state. Here is what that number does — and doesn't — tell you.
91766 has 14 ranked schools in Pomona, averaging a Scope Score of 32.3/100 — 9.7 points below the state average of 42.1 (a state average weighted to 91766's own mix of school levels; CDE CAASPP 2025). Scores range from 17.1 to 57.4, a 40.4-point spread.
How 91766 schools perform
The top-ranked school is Diamond Ranch High with a Scope Score of 57 and 20.9% of students exceeding standard.
Cohort growth among 91766's elementary schools — the returning cohort, 2023 G3 → 2025 G5 — averages +70 scale-score points across 9 schools in 91766 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 91766 averages 25.0%, above the state average of 19.0%, weighted to 91766's own level mix. CDE CAASPP 2025.
How 91766 compares to nearby zip codes
| Zip | City | Miles | Schools | Avg Score | vs 91766 |
|---|---|---|---|---|---|
| 91766 | Pomona | — | 14 | 32.3/100 | — |
| 91768 | Pomona | 2.0 | 6 | 29.5/100 | -2.8 |
| 91767 | Pomona | 2.9 | 9 | 30.1/100 | -2.3 |
| 91763 | Montclair | 4.0 | 8 | 44.1/100 | +11.7 |
| 91765 | Diamond Bar | 4.6 | 9 | 65.9/100 | +33.6 |
| 91709 | Chino Hills | 4.7 | 12 | 64.0/100 | +31.7 |
Source: CDE CAASPP 2025, analyzed by SchoolScope.
School archetypes in 91766
Hidden gems: 1 school in 91766 is classified as On the Rise — 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 91766
ranked by Scope Score · 2024–25 CAASPP
Elementary Schools (10)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Ranch Hills Elementary Pomona Unified | 22.4% | 69th percentile · SolidScope Score 45/100 |
| 2 | Westmont Elementary Pomona Unified | 10.2% | 42nd percentile · DevelopingScope Score 33/100 |
| 3 | Lexington Elementary Pomona Unified | 8.9% | 27th percentile · DevelopingScope Score 27/100 |
| 4 | Decker Elementary Pomona Unified | 11.4% | 23rd percentile · Needs SupportScope Score 26/100 |
| 5 | Philadelphia Elementary Pomona Unified | 8.1% | 21st percentile · Needs SupportScope Score 25/100 |
| 6 | Madison Elementary Pomona Unified | 12.2% | 18th percentile · Needs SupportScope Score 24/100 |
| 7 | Vejar Elementary Pomona Unified | 8.7% | 16th percentile · Needs SupportScope Score 23/100 |
| 8 | Lopez Elementary Pomona Unified | 6.8% | 15th percentile · Needs SupportScope Score 22/100 |
| 9 | Alcott Elementary Pomona Unified | 10.1% | 12th percentile · Needs SupportScope Score 21/100 |
| 10 | Washington Elementary Pomona Unified | 2.8% | 6th percentile · Needs SupportScope Score 17/100 |
Middle Schools (1)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Simons Middle Pomona Unified | 5.3% | 16th percentile · Needs SupportScope Score 22/100 |
High Schools (3)
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Diamond Ranch High Pomona Unified | 20.9% | 64th percentile · SolidScope Score 57/100 |
| 2 | Fremont Academy of Engineering and Design Pomona Unified | 12.1% | 62nd percentile · SolidScope Score 57/100 |
| 3 | Garey High Pomona Unified | 16.7% | 56th percentile · SolidScope Score 55/100 |
Schools in 91766 on the map
Open these schools 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