| Index | Marlboro | New York | National |
| Average Test Scores | 59% | 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 | Marlboro | New York | National |
| Completed 8th grade | 88.1% | 83.5% | 84.3% |
| Completed high school | 87.7% | 82.1% | 83.0% |
| Completed some college | 59.6% | 59.5% | 59.4% |
| Completed associate degree | 41.2% | 43.4% | 38.5% |
| Completed bachelors | 32.9% | 34.7% | 30.3% |
| Completed masters | 13.4% | 15.1% | 11.5% |
| Completed professional degree | 2.5% | 4.2% | 3.3% |
| Completed doctorate | 1.1% | 1.5% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Marlboro. Using the proficiency score averages, the average test scores for Marlboro, NY schools is 59%. The average student to teacher ratio is n/a. In Marlboro, NY, an average of 88.1% of students have completed 8th grade and an average of 87.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Carmel Hamlet, NY | 6,278 | 99% | 105.2% |
| Cold Spring, NY | 1,911 | 81% | 68.2% |
| Firthcliffe, NY | 5,051 | 77% | 60.4% |
| Hopewell Junction, NY | 725 | 74% | 54.9% |
| Millbrook, NY | 1,342 | 68% | 41.7% |
| Marlboro, NY | 3,720 | 59% | 23.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Quitman, GA | 3,720 | 18% | 62.5% |
| Oneida, TN | 3,719 | 32% | 32.6% |
| Thorndale, PA | 3,719 | 29% | 39.6% |
| Merton, WI | 3,721 | 72% | 49.0% |
| Boyne City, MI | 3,721 | 53% | 10.1% |
| Marlboro, NY | 3,720 | 59% | 23.3% |
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