| Index | Watertown | Connecticut | National |
| Average Test Scores | 55% | 53% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 654 | 79,221 |
| Total private schools | n/a | 207 | 24,874 |
| Total post-secondary schools | n/a | 81 | 7,963 |
| Index | Watertown | Connecticut | National |
| Completed 8th grade | 95.0% | 88.0% | 84.3% |
| Completed high school | 95.0% | 86.9% | 83.0% |
| Completed some college | 76.9% | 62.9% | 59.4% |
| Completed associate degree | 60.2% | 45.5% | 38.5% |
| Completed bachelors | 43.0% | 38.0% | 30.3% |
| Completed masters | 15.0% | 16.8% | 11.5% |
| Completed professional degree | 1.0% | 4.6% | 3.3% |
| Completed doctorate | 0.0% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Watertown. Using the proficiency score averages, the average test scores for Watertown, CT schools is 55%. The average student to teacher ratio is n/a. In Watertown, CT, an average of 95.0% of students have completed 8th grade and an average of 95.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cheshire Village, CT | 6,491 | 78% | 62.0% |
| Northwest Harwinton, CT | 2,897 | 77% | 60.4% |
| Newtown, CT | 1,921 | 71% | 48.8% |
| Plantsville, CT | 1,923 | 70% | 44.8% |
| Litchfield, CT | 1,279 | 67% | 39.4% |
| Watertown, CT | 3,620 | 55% | 13.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Lake Isabella, CA | 3,621 | 30% | 38.5% |
| Berwyn, PA | 3,621 | 86% | 79.9% |
| Ozark, AR | 3,618 | 44% | 8.1% |
| Whitesboro, NY | 3,624 | 64% | 33.1% |
| Marshall, IL | 3,615 | 34% | 29.5% |
| Watertown, CT | 3,620 | 55% | 13.5% |
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