| Index | Iselin | New Jersey | National |
| Average Test Scores | 61% | 52% | 48% |
| Student/Teacher ratio | 14:1 | 13:1 | 16:1 |
| Total public schools | 5 | 1,604 | 79,221 |
| Total private schools | 2 | 823 | 24,874 |
| Total post-secondary schools | 1 | 157 | 7,963 |
| Index | Iselin | New Jersey | National |
| Completed 8th grade | 88.6% | 87.5% | 84.3% |
| Completed high school | 87.9% | 86.3% | 83.0% |
| Completed some college | 64.1% | 60.7% | 59.4% |
| Completed associate degree | 52.2% | 43.9% | 38.5% |
| Completed bachelors | 46.2% | 37.5% | 30.3% |
| Completed masters | 16.1% | 14.4% | 11.5% |
| Completed professional degree | 3.7% | 4.0% | 3.3% |
| Completed doctorate | 0.6% | 1.5% | 1.3% |
There are a total of 5 public schools, 2 private schools and 1 post-secondary schools in Iselin. Using the proficiency score averages, the average test scores for Iselin, NJ schools is 61%. The average student to teacher ratio is 14:1. In Iselin, NJ, an average of 88.6% of students have completed 8th grade and an average of 87.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fair Haven, NJ | 5,833 | 86% | 79.7% |
| Short Hills, NJ | 13,700 | 83% | 73.8% |
| Summit, NJ | 21,913 | 81% | 69.3% |
| New Providence, NJ | 13,382 | 80% | 66.4% |
| Chatham, NJ | 8,729 | 79% | 64.9% |
| Iselin, NJ | 17,356 | 61% | 26.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Hinsdale, IL | 17,366 | 74% | 54.7% |
| Oswego, NY | 17,371 | 46% | 3.3% |
| Nederland, TX | 17,334 | 58% | 21.7% |
| Ada, OK | 17,399 | 37% | 23.7% |
| Hannibal, MO | 17,312 | 49% | 2.3% |
| Iselin, NJ | 17,356 | 61% | 26.3% |
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