| Index | Brentwood | New York | National |
| Average Test Scores | 33% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 13 | 4,060 | 79,221 |
| Total private schools | 1 | 1,092 | 24,874 |
| Total post-secondary schools | 1 | 483 | 7,963 |


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| Index | Brentwood | New York | National |
| Completed 8th grade | 68.9% | 83.5% | 84.3% |
| Completed high school | 66.5% | 82.1% | 83.0% |
| Completed some college | 34.0% | 59.5% | 59.4% |
| Completed associate degree | 18.5% | 43.4% | 38.5% |
| Completed bachelors | 13.2% | 34.7% | 30.3% |
| Completed masters | 3.9% | 15.1% | 11.5% |
| Completed professional degree | 0.8% | 4.2% | 3.3% |
| Completed doctorate | 0.2% | 1.5% | 1.3% |
There are a total of 13 public schools, 1 private schools and 1 post-secondary schools in Brentwood. Using the proficiency score averages, the average test scores for Brentwood, NY schools is 33%. The average student to teacher ratio is n/a. In Brentwood, NY, an average of 68.9% of students have completed 8th grade and an average of 66.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Old Bethpage, NY | 5,640 | 90% | 86.5% |
| Cold Spring Harbor, NY | 2,967 | 87% | 81.3% |
| Plainview, NY | 26,865 | 83% | 72.1% |
| Syosset, NY | 19,723 | 83% | 71.9% |
| West Sayville, NY | 5,133 | 82% | 69.8% |
| Brentwood, NY | 64,448 | 33% | 30.6% |
| City | Population | Avg. Test Scores | National Avg. |
| La Habra, CA | 64,441 | 42% | 13.3% |
| Waltham, MA | 64,477 | 49% | 1.7% |
| Montebello, CA | 64,503 | 32% | 33.4% |
| Idaho Falls, ID | 64,374 | 44% | 8.3% |
| Doral, FL | 64,546 | 76% | 58.7% |
| Brentwood, NY | 64,448 | 33% | 30.6% |