| Index | New Milford | Connecticut | National |
| Average Test Scores | 56% | 53% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 7 | 654 | 79,221 |
| Total private schools | 1 | 207 | 24,874 |
| Total post-secondary schools | n/a | 81 | 7,963 |
| Index | New Milford | Connecticut | National |
| Completed 8th grade | 84.2% | 88.0% | 84.3% |
| Completed high school | 81.8% | 86.9% | 83.0% |
| Completed some college | 56.2% | 62.9% | 59.4% |
| Completed associate degree | 36.8% | 45.5% | 38.5% |
| Completed bachelors | 28.8% | 38.0% | 30.3% |
| Completed masters | 9.0% | 16.8% | 11.5% |
| Completed professional degree | 0.6% | 4.6% | 3.3% |
| Completed doctorate | 0.4% | 1.7% | 1.3% |
There are a total of 7 public schools, 1 private schools and n/a post-secondary schools in New Milford. Using the proficiency score averages, the average test scores for New Milford, CT schools is 56%. The average student to teacher ratio is 15:1. In New Milford, CT, an average of 84.2% of students have completed 8th grade and an average of 81.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Carmel Hamlet, NY | 6,278 | 99% | 105.2% |
| Newtown, CT | 1,921 | 71% | 48.8% |
| Pawling, NY | 2,105 | 68% | 42.0% |
| Millbrook, NY | 1,342 | 68% | 41.7% |
| Litchfield, CT | 1,279 | 67% | 39.4% |
| New Milford, CT | 6,749 | 56% | 16.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Kingston, MA | 6,750 | 61% | 27.4% |
| Roeland Park, KS | 6,747 | 67% | 39.6% |
| Marble Falls, TX | 6,746 | 41% | 15.2% |
| Lemoore Station, CA | 6,756 | 59% | 22.4% |
| Rumson, NJ | 6,757 | 82% | 70.5% |
| New Milford, CT | 6,749 | 56% | 16.0% |
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