Schools in 91764 — Ontario, California: 13 schools. Average score 2.5 points below the state. Here is what that number does — and doesn't — tell you.
91764 has 13 ranked schools in Ontario, averaging a Scope Score of 42.3/100 — 2.5 points below the state average of 44.8 (CDE CAASPP 2025). Scores range from 18.9 to 62.8, a 43.9-point spread.
How 91764 schools perform
The top-ranked school is Edison Elementary with a Scope Score of 63 and 36.4% of students exceeding standard.
Chronic absenteeism across 91764 averages 17.6%, near the state average of 17.9%. CDE CAASPP 2025.
How 91764 compares to nearby zip codes
| Zip | City | Schools | Avg Score | vs 91764 |
|---|---|---|---|---|
| 91764 | Ontario | 13 | Developing 42.3/100 | — |
| 91763 | Montclair | 8 | Developing 50.0/100 | +7.7 |
| 91765 | Diamond Bar | 9 | Solid 67.8/100 | +25.5 |
| 91762 | Ontario | 11 | Developing 46.2/100 | +3.8 |
| 91766 | Pomona | 14 | Developing 37.2/100 | -5.1 |
| 91761 | Ontario | 10 | Developing 47.6/100 | +5.3 |
Source: CDE CAASPP 2025, analyzed by SchoolScope.
School archetypes in 91764
Hidden gems: 5 schools in 91764 are classified as On the Rise (4) or Growth Engine — 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 91764
ranked by Scope Score · 2024–25 CAASPP
| # | School | Exceeded | Score |
|---|---|---|---|
| 1 | Edison Elementary Ontario-Montclair Building Momentum | 36.4% | Solid 63/100 |
| 2 | Chaffey District Online High Chaffey Joint Union High Building Momentum | 42.6% | Solid 55/100 |
| 3 | Corona Elementary Ontario-Montclair Growth Engine | 24.1% | Solid 53/100 |
| 4 | Central Language Academy Ontario-Montclair On the Rise | 13.9% | Developing 49/100 |
| 5 | Vineyard Elementary Ontario-Montclair On the Rise | 14.8% | Developing 48/100 |
| 6 | Lincoln Elementary Ontario-Montclair Culture First | 14.6% | Developing 46/100 |
| 7 | Berlyn Elementary Ontario-Montclair On the Rise | 8.5% | Developing 39/100 |
| 8 | Del Norte Elementary Ontario-Montclair Culture First | 10.4% | Developing 38/100 |
| 9 | Mariposa Elementary Ontario-Montclair On the Rise | 10.0% | Developing 38/100 |
| 10 | Ray Wiltsey Middle Ontario-Montclair Building Momentum | 10.0% | Developing 36/100 |
| 11 | Arroyo Elementary Ontario-Montclair Culture First | 8.5% | Developing 35/100 |
| 12 | Ontario Center Cucamonga Elementary Building Momentum | 6.8% | Developing 31/100 |
| 13 | Valley View High (Continuation) Chaffey Joint Union High Building Momentum | 1.3% | Needs Support 19/100 |
Schools in 91764 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