| Index | Mattituck | New York | National |
| Average Test Scores | 77% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 1 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Mattituck | New York | National |
| Completed 8th grade | 93.0% | 83.5% | 84.3% |
| Completed high school | 92.7% | 82.1% | 83.0% |
| Completed some college | 64.2% | 59.5% | 59.4% |
| Completed associate degree | 45.9% | 43.4% | 38.5% |
| Completed bachelors | 38.1% | 34.7% | 30.3% |
| Completed masters | 18.9% | 15.1% | 11.5% |
| Completed professional degree | 4.5% | 4.2% | 3.3% |
| Completed doctorate | 3.4% | 1.5% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Mattituck. Using the proficiency score averages, the average test scores for Mattituck, NY schools is 77%. The average student to teacher ratio is n/a. In Mattituck, NY, an average of 93.0% of students have completed 8th grade and an average of 92.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Quogue, NY | 600 | 80% | 66.7% |
| Westhampton Beach, NY | 1,869 | 73% | 51.7% |
| Center Moriches, NY | 7,906 | 66% | 36.5% |
| Sag Harbor, NY | 1,959 | 65% | 34.4% |
| East Moriches, NY | 4,902 | 63% | 31.8% |
| Mattituck, NY | 4,898 | 77% | 60.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Mount Pleasant, TN | 4,899 | 25% | 47.2% |
| Houlton, ME | 4,897 | 45% | 6.6% |
| Meadows Place, TX | 4,899 | 53% | 10.9% |
| Davison, MI | 4,896 | 52% | 9.2% |
| Willits, CA | 4,895 | 37% | 23.7% |
| Mattituck, NY | 4,898 | 77% | 60.4% |
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