| Index | Willimantic | Connecticut | National |
| Average Test Scores | 29% | 53% | 48% |
| Student/Teacher ratio | 12:1 | 14:1 | 16:1 |
| Total public schools | 9 | 654 | 79,221 |
| Total private schools | 2 | 207 | 24,874 |
| Total post-secondary schools | 2 | 81 | 7,963 |
| Index | Willimantic | Connecticut | National |
| Completed 8th grade | 76.0% | 88.0% | 84.3% |
| Completed high school | 71.8% | 86.9% | 83.0% |
| Completed some college | 44.4% | 62.9% | 59.4% |
| Completed associate degree | 24.5% | 45.5% | 38.5% |
| Completed bachelors | 17.6% | 38.0% | 30.3% |
| Completed masters | 8.5% | 16.8% | 11.5% |
| Completed professional degree | 1.7% | 4.6% | 3.3% |
| Completed doctorate | 0.6% | 1.7% | 1.3% |
There are a total of 9 public schools, 2 private schools and 2 post-secondary schools in Willimantic. Using the proficiency score averages, the average test scores for Willimantic, CT schools is 29%. The average student to teacher ratio is 12:1. In Willimantic, CT, an average of 76.0% of students have completed 8th grade and an average of 71.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Storrs, CT | 16,897 | 77% | 60.4% |
| South Coventry, CT | 1,470 | 73% | 51.4% |
| Mansfield Center, CT | 1,395 | 71% | 47.4% |
| Colchester, CT | 5,282 | 65% | 35.4% |
| Moodus, CT | 1,844 | 63% | 31.6% |
| Willimantic, CT | 19,354 | 29% | 38.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Altoona, IA | 19,348 | 79% | 63.8% |
| Claremore, OK | 19,346 | 40% | 16.6% |
| Point Pleasant, NJ | 19,373 | 62% | 28.4% |
| Wallingford Center, CT | 19,374 | 49% | 2.4% |
| Westbrook, ME | 19,325 | 38% | 21.7% |
| Willimantic, CT | 19,354 | 29% | 38.9% |
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