| Index | 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 | Great River | New York | National |
| Completed 8th grade | 96.2% | 83.5% | 84.3% |
| Completed high school | 95.5% | 82.1% | 83.0% |
| Completed some college | 78.1% | 59.5% | 59.4% |
| Completed associate degree | 62.5% | 43.4% | 38.5% |
| Completed bachelors | 54.5% | 34.7% | 30.3% |
| Completed masters | 34.3% | 15.1% | 11.5% |
| Completed professional degree | 15.7% | 4.2% | 3.3% |
| Completed doctorate | 4.6% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Great River. Using the proficiency score averages, the average test scores for Great River, NY schools is n/a. The average student to teacher ratio is n/a. In Great River, NY, an average of 96.2% of students have completed 8th grade and an average of 95.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 4,956 | 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% |
| Greenlawn, NY | 14,598 | 78% | 62.8% |
| Great River, NY | 1,961 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Questa, NM | 1,961 | 27% | 43.3% |
| Clinton, NY | 1,961 | 71% | 48.3% |
| Boonville, NY | 1,960 | 58% | 19.8% |
| Sag Harbor, NY | 1,959 | 65% | 34.4% |
| Stillwater, NY | 1,959 | 64% | 32.8% |
| Great River, NY | 1,961 | n/a |
Here are the best places to live in New York
See the best places to live in Great River
These are the largest cities in New York
Most Dangerous Cities In The US