| 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 | 5,450 | 90% | 86.5% |
| Cold Spring Harbor, NY | 2,864 | 87% | 81.3% |
| Plainview, NY | 26,267 | 83% | 72.1% |
| Syosset, NY | 19,254 | 83% | 71.9% |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Brentwood, NY | 62,743 | 33% | 30.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Springfield, OR | 62,729 | 41% | 15.3% |
| Coon Rapids, MN | 62,706 | 49% | 1.5% |
| La Habra, CA | 62,787 | 42% | 13.3% |
| Montebello, CA | 62,697 | 32% | 33.4% |
| Waltham, MA | 62,597 | 49% | 1.7% |
| Brentwood, NY | 62,743 | 33% | 30.6% |
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