| Index | Mastic Beach | New York | National |
| Average Test Scores | 47% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 3 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
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| Index | Mastic Beach | New York | National |
| Completed 8th grade | 80.2% | 83.5% | 84.3% |
| Completed high school | 79.6% | 82.1% | 83.0% |
| Completed some college | 41.9% | 59.5% | 59.4% |
| Completed associate degree | 23.9% | 43.4% | 38.5% |
| Completed bachelors | 16.2% | 34.7% | 30.3% |
| Completed masters | 6.6% | 15.1% | 11.5% |
| Completed professional degree | 1.5% | 4.2% | 3.3% |
| Completed doctorate | 0.6% | 1.5% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Mastic Beach. Using the proficiency score averages, the average test scores for Mastic Beach, NY schools is 47%. The average student to teacher ratio is n/a. In Mastic Beach, NY, an average of 80.2% of students have completed 8th grade and an average of 79.6% 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% |
| Quogue, NY | 600 | 80% | 66.7% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Port Jefferson, NY | 8,016 | 77% | 60.8% |
| Mastic Beach, NY | 15,610 | 47% | 2.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Hermitage, PA | 15,603 | 69% | 44.3% |
| Niceville, FL | 15,619 | 83% | 71.9% |
| Mitchell, SD | 15,599 | 52% | 8.7% |
| Fillmore, CA | 15,631 | 25% | 48.1% |
| Overland, MO | 15,644 | 35% | 28.1% |
| Mastic Beach, NY | 15,610 | 47% | 2.8% |
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