| Index | Thomaston | Connecticut | National |
| Average Test Scores | 47% | 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 | Thomaston | Connecticut | National |
| Completed 8th grade | 87.6% | 88.0% | 84.3% |
| Completed high school | 86.4% | 86.9% | 83.0% |
| Completed some college | 42.1% | 62.9% | 59.4% |
| Completed associate degree | 27.4% | 45.5% | 38.5% |
| Completed bachelors | 21.2% | 38.0% | 30.3% |
| Completed masters | 5.0% | 16.8% | 11.5% |
| Completed professional degree | 0.0% | 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 Thomaston. Using the proficiency score averages, the average test scores for Thomaston, CT schools is 47%. The average student to teacher ratio is n/a. In Thomaston, CT, an average of 87.6% of students have completed 8th grade and an average of 86.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Simsbury Center, CT | 6,271 | 79% | 63.5% |
| Cheshire Village, CT | 6,491 | 78% | 62.0% |
| West Simsbury, CT | 3,131 | 77% | 60.4% |
| Northwest Harwinton, CT | 2,897 | 77% | 60.4% |
| Weatogue, CT | 2,396 | 72% | 49.0% |
| Thomaston, CT | 1,730 | 47% | 2.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Hebron, IL | 1,730 | 36% | 26.0% |
| Oberlin, KS | 1,730 | 35% | 28.1% |
| Mayfield, PA | 1,730 | 50% | 3.1% |
| Winterville, GA | 1,731 | 27% | 43.8% |
| Chester Center, CT | 1,731 | 77% | 60.4% |
| Thomaston, CT | 1,730 | 47% | 2.1% |
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