| Index | Yaphank | New York | National |
| Average Test Scores | 42% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 2 | 4,060 | 79,221 |
| Total private schools | 1 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Yaphank | New York | National |
| Completed 8th grade | 87.5% | 83.5% | 84.3% |
| Completed high school | 87.2% | 82.1% | 83.0% |
| Completed some college | 57.7% | 59.5% | 59.4% |
| Completed associate degree | 39.0% | 43.4% | 38.5% |
| Completed bachelors | 28.4% | 34.7% | 30.3% |
| Completed masters | 13.9% | 15.1% | 11.5% |
| Completed professional degree | 2.3% | 4.2% | 3.3% |
| Completed doctorate | 0.7% | 1.5% | 1.3% |
There are a total of 2 public schools, 1 private schools and n/a post-secondary schools in Yaphank. Using the proficiency score averages, the average test scores for Yaphank, NY schools is 42%. The average student to teacher ratio is n/a. In Yaphank, NY, an average of 87.5% of students have completed 8th grade and an average of 87.2% 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% |
| Port Jefferson, NY | 8,016 | 77% | 60.8% |
| Yaphank, NY | 6,060 | 42% | 12.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Milan, MI | 6,057 | 47% | 1.4% |
| Louisville, MS | 6,063 | 42% | 13.3% |
| Metropolis, IL | 6,053 | 42% | 12.5% |
| Greenwood, MO | 6,067 | 63% | 30.2% |
| Willows, CA | 6,053 | 29% | 40.1% |
| Yaphank, NY | 6,060 | 42% | 12.5% |
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