| Index | Seaford | New York | National |
| Average Test Scores | 73% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 5 | 4,060 | 79,221 |
| Total private schools | 2 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | Seaford | New York | National |
| Completed 8th grade | 93.8% | 83.5% | 84.3% |
| Completed high school | 93.7% | 82.1% | 83.0% |
| Completed some college | 71.0% | 59.5% | 59.4% |
| Completed associate degree | 49.8% | 43.4% | 38.5% |
| Completed bachelors | 40.0% | 34.7% | 30.3% |
| Completed masters | 15.2% | 15.1% | 11.5% |
| Completed professional degree | 3.4% | 4.2% | 3.3% |
| Completed doctorate | 0.6% | 1.5% | 1.3% |
There are a total of 5 public schools, 2 private schools and n/a post-secondary schools in Seaford. Using the proficiency score averages, the average test scores for Seaford, NY schools is 73%. The average student to teacher ratio is n/a. In Seaford, NY, an average of 93.8% of students have completed 8th grade and an average of 93.7% 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% |
| Seaford, NY | 15,153 | 73% | 51.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Olivehurst, CA | 15,149 | 26% | 46.6% |
| Beech Grove, IN | 15,148 | 29% | 38.8% |
| Newton, IA | 15,160 | 69% | 43.6% |
| Weston, WI | 15,139 | 45% | 7.1% |
| Graham, NC | 15,168 | 37% | 22.6% |
| Seaford, NY | 15,153 | 73% | 51.3% |
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