| Index | West Islip | New York | National |
| Average Test Scores | 62% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 9 | 4,060 | 79,221 |
| Total private schools | 2 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | West Islip | New York | National |
| Completed 8th grade | 92.6% | 83.5% | 84.3% |
| Completed high school | 92.0% | 82.1% | 83.0% |
| Completed some college | 65.6% | 59.5% | 59.4% |
| Completed associate degree | 47.8% | 43.4% | 38.5% |
| Completed bachelors | 36.5% | 34.7% | 30.3% |
| Completed masters | 17.8% | 15.1% | 11.5% |
| Completed professional degree | 4.7% | 4.2% | 3.3% |
| Completed doctorate | 1.2% | 1.5% | 1.3% |
There are a total of 9 public schools, 2 private schools and n/a post-secondary schools in West Islip. Using the proficiency score averages, the average test scores for West Islip, NY schools is 62%. The average student to teacher ratio is n/a. In West Islip, NY, an average of 92.6% of students have completed 8th grade and an average of 92.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Jericho, NY | 13,928 | 90% | 87.1% |
| Old Bethpage, NY | 5,450 | 90% | 86.5% |
| Cold Spring Harbor, NY | 2,864 | 87% | 81.3% |
| East Meadow, NY | 37,992 | 86% | 79.2% |
| Plainview, NY | 26,267 | 83% | 72.1% |
| West Islip, NY | 26,614 | 62% | 29.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Alvin, TX | 26,592 | 42% | 11.6% |
| Daphne, AL | 26,578 | 64% | 33.8% |
| Garden City, MI | 26,565 | 38% | 21.6% |
| Brownsburg, IN | 26,560 | 78% | 63.0% |
| Wooster, OH | 26,557 | 74% | 54.9% |
| West Islip, NY | 26,614 | 62% | 29.2% |
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