| Index | Ontario | California | National |
| Average Test Scores | 37% | 43% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 37 | 8,308 | 79,221 |
| Total private schools | 11 | 3,438 | 24,874 |
| Total post-secondary schools | 9 | 1,085 | 7,963 |
| Index | Ontario | California | National |
| Completed 8th grade | 70.6% | 81.1% | 84.3% |
| Completed high school | 68.7% | 79.8% | 83.0% |
| Completed some college | 44.2% | 61.5% | 59.4% |
| Completed associate degree | 21.7% | 39.8% | 38.5% |
| Completed bachelors | 14.9% | 32.0% | 30.3% |
| Completed masters | 3.9% | 11.9% | 11.5% |
| Completed professional degree | 0.9% | 3.9% | 3.3% |
| Completed doctorate | 0.3% | 1.6% | 1.3% |
There are a total of 37 public schools, 11 private schools and 9 post-secondary schools in Ontario. Using the proficiency score averages, the average test scores for Ontario, CA schools is 37%. The average student to teacher ratio is 21:1. In Ontario, CA, an average of 70.6% of students have completed 8th grade and an average of 68.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Yorba Linda, CA | 68,103 | 72% | 50.3% |
| Walnut, CA | 29,764 | 70% | 44.9% |
| Diamond Bar, CA | 55,870 | 67% | 39.8% |
| La Verne, CA | 32,346 | 67% | 39.2% |
| Eastvale, CA | 65,766 | 62% | 29.6% |
| Ontario, CA | 178,194 | 37% | 23.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Rancho Cucamonga, CA | 178,060 | 60% | 25.3% |
| Santa Rosa, CA | 178,391 | 40% | 16.6% |
| Providence, RI | 179,472 | 20% | 59.1% |
| Newport News, VA | 179,582 | 67% | 39.3% |
| Oceanside, CA | 175,694 | 43% | 9.5% |
| Ontario, CA | 178,194 | 37% | 23.1% |
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