| Index | Gilgo | New York | National |
| Average Test Scores | n/a | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Gilgo | New York | National |
| Completed 8th grade | 100.0% | 83.5% | 84.3% |
| Completed high school | 100.0% | 82.1% | 83.0% |
| Completed some college | 100.0% | 59.5% | 59.4% |
| Completed associate degree | 76.4% | 43.4% | 38.5% |
| Completed bachelors | 76.4% | 34.7% | 30.3% |
| Completed masters | 52.7% | 15.1% | 11.5% |
| Completed professional degree | 9.3% | 4.2% | 3.3% |
| Completed doctorate | 4.4% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Gilgo. Using the proficiency score averages, the average test scores for Gilgo, NY schools is n/a. The average student to teacher ratio is n/a. In Gilgo, NY, an average of 100.0% of students have completed 8th grade and an average of 100.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sea Cliff, NY | 5,045 | 92% | 91.7% |
| Old Westbury, NY | 4,618 | 91% | 88.5% |
| Jericho, NY | 13,928 | 90% | 87.1% |
| Old Bethpage, NY | 5,450 | 90% | 86.5% |
| Glen Head, NY | 4,843 | 89% | 85.7% |
| Gilgo, NY | 201 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Darlington, PA | 201 | 52% | 8.3% |
| Downsville, WI | 201 | 25% | 47.9% |
| Sand Coulee, MT | 201 | 54% | 11.7% |
| Cosby, MO | 200 | 65% | 34.4% |
| Grayling, AK | 200 | 20% | 58.3% |
| Gilgo, NY | 201 | n/a |
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