| Index | Closter | New Jersey | National |
| Average Test Scores | 85% | 52% | 48% |
| Student/Teacher ratio | 16:1 | 13:1 | 16:1 |
| Total public schools | 2 | 1,604 | 79,221 |
| Total private schools | 2 | 823 | 24,874 |
| Total post-secondary schools | n/a | 157 | 7,963 |
| Index | Closter | New Jersey | National |
| Completed 8th grade | 96.2% | 87.5% | 84.3% |
| Completed high school | 96.2% | 86.3% | 83.0% |
| Completed some college | 76.5% | 60.7% | 59.4% |
| Completed associate degree | 66.0% | 43.9% | 38.5% |
| Completed bachelors | 62.0% | 37.5% | 30.3% |
| Completed masters | 24.5% | 14.4% | 11.5% |
| Completed professional degree | 8.7% | 4.0% | 3.3% |
| Completed doctorate | 3.1% | 1.5% | 1.3% |
There are a total of 2 public schools, 2 private schools and n/a post-secondary schools in Closter. Using the proficiency score averages, the average test scores for Closter, NJ schools is 85%. The average student to teacher ratio is 16:1. In Closter, NJ, an average of 96.2% of students have completed 8th grade and an average of 96.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Orangeburg, NY | 4,454 | 98% | 103.1% |
| Teterboro, NJ | 110 | 95% | 96.9% |
| Bronxville, NY | 6,450 | 88% | 82.3% |
| Scarsdale, NY | 17,890 | 87% | 81.8% |
| Alpine, NJ | 1,459 | 87% | 81.3% |
| Closter, NJ | 8,551 | 85% | 76.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Frostburg, MD | 8,550 | 58% | 20.3% |
| East Grand Forks, MN | 8,555 | 51% | 6.6% |
| Dayton, TX | 8,546 | 39% | 19.2% |
| Manteno, IL | 8,545 | 34% | 29.9% |
| Bridgewater, MA | 8,544 | 62% | 28.1% |
| Closter, NJ | 8,551 | 85% | 76.6% |
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