| Index | West Sayville | New York | National |
| Average Test Scores | 82% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 2 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | West Sayville | New York | National |
| Completed 8th grade | 90.2% | 83.5% | 84.3% |
| Completed high school | 90.2% | 82.1% | 83.0% |
| Completed some college | 64.1% | 59.5% | 59.4% |
| Completed associate degree | 46.2% | 43.4% | 38.5% |
| Completed bachelors | 35.8% | 34.7% | 30.3% |
| Completed masters | 14.5% | 15.1% | 11.5% |
| Completed professional degree | 2.0% | 4.2% | 3.3% |
| Completed doctorate | 1.1% | 1.5% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in West Sayville. Using the proficiency score averages, the average test scores for West Sayville, NY schools is 82%. The average student to teacher ratio is n/a. In West Sayville, NY, an average of 90.2% of students have completed 8th grade and an average of 90.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| 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% |
| Port Jefferson, NY | 8,016 | 77% | 60.8% |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Watseka, IL | 4,956 | 34% | 29.2% |
| Barling, AR | 4,957 | 50% | 3.1% |
| Needles, CA | 4,959 | 37% | 23.8% |
| Perry, OK | 4,959 | 30% | 37.5% |
| Buckley, WA | 4,960 | 66% | 37.0% |
| West Sayville, NY | 4,956 | 82% | 69.8% |
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