| Index | Demarest | New Jersey | National |
| Average Test Scores | 80% | 52% | 48% |
| Student/Teacher ratio | 16:1 | 13:1 | 16:1 |
| Total public schools | 4 | 1,604 | 79,221 |
| Total private schools | 2 | 823 | 24,874 |
| Total post-secondary schools | n/a | 157 | 7,963 |
| Index | Demarest | New Jersey | National |
| Completed 8th grade | 96.4% | 87.5% | 84.3% |
| Completed high school | 96.4% | 86.3% | 83.0% |
| Completed some college | 83.0% | 60.7% | 59.4% |
| Completed associate degree | 70.1% | 43.9% | 38.5% |
| Completed bachelors | 63.9% | 37.5% | 30.3% |
| Completed masters | 28.5% | 14.4% | 11.5% |
| Completed professional degree | 9.2% | 4.0% | 3.3% |
| Completed doctorate | 1.4% | 1.5% | 1.3% |
There are a total of 4 public schools, 2 private schools and n/a post-secondary schools in Demarest. Using the proficiency score averages, the average test scores for Demarest, NJ schools is 80%. The average student to teacher ratio is 16:1. In Demarest, NJ, an average of 96.4% of students have completed 8th grade and an average of 96.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Orangeburg, NY | 4,454 | 98% | 103.1% |
| Teterboro, NJ | 110 | 95% | 96.9% |
| Bronxville, NY | 6,450 | 88% | 82.3% |
| Scarsdale, NY | 17,890 | 87% | 81.8% |
| Alpine, NJ | 1,459 | 87% | 81.3% |
| Demarest, NJ | 4,911 | 80% | 67.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Falmouth, VA | 4,911 | 78% | 63.2% |
| Northvale, NJ | 4,911 | 72% | 49.0% |
| Pascoag, RI | 4,911 | 31% | 35.4% |
| Fairfield, IL | 4,912 | 40% | 17.3% |
| Eagar, AZ | 4,910 | 48% | 0.5% |
| Demarest, NJ | 4,911 | 80% | 67.4% |
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