| Index | Glendora | California | National |
| Average Test Scores | 54% | 43% | 48% |
| Student/Teacher ratio | 22:1 | 20:1 | 16:1 |
| Total public schools | 10 | 8,308 | 79,221 |
| Total private schools | 5 | 3,438 | 24,874 |
| Total post-secondary schools | 3 | 1,085 | 7,963 |
| Index | Glendora | California | National |
| Completed 8th grade | 88.7% | 81.1% | 84.3% |
| Completed high school | 88.1% | 79.8% | 83.0% |
| Completed some college | 70.8% | 61.5% | 59.4% |
| Completed associate degree | 44.1% | 39.8% | 38.5% |
| Completed bachelors | 33.2% | 32.0% | 30.3% |
| Completed masters | 13.1% | 11.9% | 11.5% |
| Completed professional degree | 3.2% | 3.9% | 3.3% |
| Completed doctorate | 1.4% | 1.6% | 1.3% |
There are a total of 10 public schools, 5 private schools and 3 post-secondary schools in Glendora. Using the proficiency score averages, the average test scores for Glendora, CA schools is 54%. The average student to teacher ratio is 22:1. In Glendora, CA, an average of 88.7% of students have completed 8th grade and an average of 88.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Arcadia, CA | 57,053 | 74% | 53.2% |
| Walnut, CA | 29,764 | 70% | 44.9% |
| Diamond Bar, CA | 55,870 | 67% | 39.8% |
| La Verne, CA | 32,346 | 67% | 39.2% |
| Sierra Madre, CA | 10,829 | 66% | 37.0% |
| Glendora, CA | 51,087 | 54% | 12.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Battle Creek, MI | 51,084 | 32% | 32.5% |
| Florissant, MO | 51,220 | 29% | 39.2% |
| Grand Island, NE | 51,250 | 46% | 5.0% |
| Wylie, TX | 51,251 | 67% | 38.9% |
| Levittown, NY | 51,266 | 76% | 58.6% |
| Glendora, CA | 51,087 | 54% | 12.3% |
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