| Index | Montclair | California | National |
| Average Test Scores | 45% | 43% | 48% |
| Student/Teacher ratio | 23:1 | 20:1 | 16:1 |
| Total public schools | 10 | 8,308 | 79,221 |
| Total private schools | 3 | 3,438 | 24,874 |
| Total post-secondary schools | 1 | 1,085 | 7,963 |
| Index | Montclair | California | National |
| Completed 8th grade | 70.7% | 81.1% | 84.3% |
| Completed high school | 68.5% | 79.8% | 83.0% |
| Completed some college | 41.8% | 61.5% | 59.4% |
| Completed associate degree | 21.7% | 39.8% | 38.5% |
| Completed bachelors | 14.3% | 32.0% | 30.3% |
| Completed masters | 2.7% | 11.9% | 11.5% |
| Completed professional degree | 0.8% | 3.9% | 3.3% |
| Completed doctorate | 0.2% | 1.6% | 1.3% |
There are a total of 10 public schools, 3 private schools and 1 post-secondary schools in Montclair. Using the proficiency score averages, the average test scores for Montclair, CA schools is 45%. The average student to teacher ratio is 23:1. In Montclair, CA, an average of 70.7% of students have completed 8th grade and an average of 68.5% 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% |
| Montclair, CA | 40,041 | 45% | 6.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Hagerstown, MD | 40,027 | 44% | 8.8% |
| Spanish Fork, UT | 40,069 | 45% | 6.5% |
| Hilton Head Island, SC | 40,000 | 57% | 18.2% |
| Hollister, CA | 40,100 | 46% | 5.1% |
| Cape Girardeau, MO | 40,100 | 42% | 11.6% |
| Montclair, CA | 40,041 | 45% | 6.1% |
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