| Index | Brookhaven | New York | National |
| Average Test Scores | 66% | 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 |
| Index | Brookhaven | New York | National |
| Completed 8th grade | 85.0% | 83.5% | 84.3% |
| Completed high school | 82.5% | 82.1% | 83.0% |
| Completed some college | 63.8% | 59.5% | 59.4% |
| Completed associate degree | 45.0% | 43.4% | 38.5% |
| Completed bachelors | 36.3% | 34.7% | 30.3% |
| Completed masters | 17.3% | 15.1% | 11.5% |
| Completed professional degree | 3.1% | 4.2% | 3.3% |
| Completed doctorate | 1.2% | 1.5% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Brookhaven. Using the proficiency score averages, the average test scores for Brookhaven, NY schools is 66%. The average student to teacher ratio is n/a. In Brookhaven, NY, an average of 85.0% of students have completed 8th grade and an average of 82.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 5,133 | 82% | 69.8% |
| Shoreham, NY | 390 | 82% | 69.8% |
| Setauket-East Setauket, NY | 14,614 | 80% | 65.6% |
| Port Jefferson, NY | 8,248 | 77% | 60.8% |
| St. James, NY | 13,838 | 76% | 59.0% |
| Brookhaven, NY | 3,306 | 66% | 37.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Newton, MS | 3,306 | 35% | 27.4% |
| Welsh, LA | 3,307 | 75% | 55.7% |
| North Lakeville, MA | 3,305 | 55% | 13.5% |
| Hartsdale, NY | 3,308 | 56% | 16.1% |
| Cloverdale, VA | 3,303 | 88% | 82.8% |
| Brookhaven, NY | 3,306 | 66% | 37.0% |
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