| Index | North Great River | 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 | North Great River | New York | National |
| Completed 8th grade | 88.3% | 83.5% | 84.3% |
| Completed high school | 88.3% | 82.1% | 83.0% |
| Completed some college | 55.0% | 59.5% | 59.4% |
| Completed associate degree | 33.8% | 43.4% | 38.5% |
| Completed bachelors | 24.8% | 34.7% | 30.3% |
| Completed masters | 8.4% | 15.1% | 11.5% |
| Completed professional degree | 0.0% | 4.2% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in North Great River. Using the proficiency score averages, the average test scores for North Great River, NY schools is n/a. The average student to teacher ratio is n/a. In North Great River, NY, an average of 88.3% of students have completed 8th grade and an average of 88.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Shoreham, NY | 375 | 82% | 69.8% |
| Hauppauge, NY | 19,661 | 80% | 66.3% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Elwood, NY | 11,582 | 79% | 63.5% |
| North Great River, NY | 3,396 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Newcastle, WY | 3,395 | 55% | 13.5% |
| Karnes City, TX | 3,398 | 43% | 11.5% |
| Kenedy, TX | 3,394 | 39% | 19.4% |
| Frontenac, KS | 3,398 | 35% | 26.4% |
| Clayton, DE | 3,393 | 51% | 7.0% |
| North Great River, NY | 3,396 | n/a |
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