| Index | Glen Gardner | New Jersey | National |
| Average Test Scores | 62% | 52% | 48% |
| Student/Teacher ratio | 13:1 | 13:1 | 16:1 |
| Total public schools | 2 | 1,604 | 79,221 |
| Total private schools | 1 | 823 | 24,874 |
| Total post-secondary schools | n/a | 157 | 7,963 |
| Index | Glen Gardner | New Jersey | National |
| Completed 8th grade | 91.4% | 87.5% | 84.3% |
| Completed high school | 91.1% | 86.3% | 83.0% |
| Completed some college | 68.3% | 60.7% | 59.4% |
| Completed associate degree | 52.5% | 43.9% | 38.5% |
| Completed bachelors | 44.7% | 37.5% | 30.3% |
| Completed masters | 14.0% | 14.4% | 11.5% |
| Completed professional degree | 1.9% | 4.0% | 3.3% |
| Completed doctorate | 0.3% | 1.5% | 1.3% |
There are a total of 2 public schools, 1 private schools and n/a post-secondary schools in Glen Gardner. Using the proficiency score averages, the average test scores for Glen Gardner, NJ schools is 62%. The average student to teacher ratio is 13:1. In Glen Gardner, NJ, an average of 91.4% of students have completed 8th grade and an average of 91.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bradley Gardens, NJ | 14,714 | 81% | 68.2% |
| Annandale, NJ | 1,794 | 79% | 63.5% |
| Chester, NJ | 1,514 | 74% | 53.5% |
| Asbury, NJ | 207 | 70% | 44.8% |
| Califon, NJ | 1,184 | 69% | 43.1% |
| Glen Gardner, NJ | 1,554 | 62% | 29.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Whitehall, WI | 1,554 | 34% | 28.6% |
| Luther, OK | 1,555 | 29% | 40.3% |
| Mio, MI | 1,555 | 36% | 25.5% |
| Palmyra, IN | 1,553 | 68% | 41.7% |
| Shelburn, IN | 1,553 | 30% | 38.5% |
| Glen Gardner, NJ | 1,554 | 62% | 29.2% |
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