| Index | Syosset | New York | National |
| Average Test Scores | 83% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 11 | 4,060 | 79,221 |
| Total private schools | 5 | 1,092 | 24,874 |
| Total post-secondary schools | 2 | 483 | 7,963 |
| Index | Syosset | New York | National |
| Completed 8th grade | 95.2% | 83.5% | 84.3% |
| Completed high school | 95.0% | 82.1% | 83.0% |
| Completed some college | 82.6% | 59.5% | 59.4% |
| Completed associate degree | 70.9% | 43.4% | 38.5% |
| Completed bachelors | 63.2% | 34.7% | 30.3% |
| Completed masters | 29.9% | 15.1% | 11.5% |
| Completed professional degree | 10.2% | 4.2% | 3.3% |
| Completed doctorate | 2.5% | 1.5% | 1.3% |
There are a total of 11 public schools, 5 private schools and 2 post-secondary schools in Syosset. Using the proficiency score averages, the average test scores for Syosset, NY schools is 83%. The average student to teacher ratio is n/a. In Syosset, NY, an average of 95.2% of students have completed 8th grade and an average of 95.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sea Cliff, NY | 5,045 | 92% | 91.7% |
| Cedarhurst, NY | 6,642 | 91% | 89.6% |
| Old Westbury, NY | 4,618 | 91% | 88.5% |
| Jericho, NY | 13,928 | 90% | 87.1% |
| Old Bethpage, NY | 5,450 | 90% | 86.5% |
| Syosset, NY | 19,254 | 83% | 71.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Murray, KY | 19,254 | 61% | 26.6% |
| Mamaroneck, NY | 19,247 | 77% | 60.6% |
| Sylvania, OH | 19,242 | 77% | 60.7% |
| Arbutus, MD | 19,267 | 30% | 38.5% |
| Mineola, NY | 19,267 | 60% | 24.0% |
| Syosset, NY | 19,254 | 83% | 71.9% |
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