| Index | Thornville | Ohio | National |
| Average Test Scores | 68% | 61% | 48% |
| Student/Teacher ratio | n/a | 17:1 | 16:1 |
| Total public schools | n/a | 3,650 | 79,221 |
| Total private schools | n/a | 1,000 | 24,874 |
| Total post-secondary schools | n/a | 393 | 7,963 |
| Index | Thornville | Ohio | National |
| Completed 8th grade | 94.7% | 86.9% | 84.3% |
| Completed high school | 94.7% | 85.6% | 83.0% |
| Completed some college | 51.8% | 55.7% | 59.4% |
| Completed associate degree | 27.4% | 35.1% | 38.5% |
| Completed bachelors | 18.5% | 26.7% | 30.3% |
| Completed masters | 4.9% | 10.0% | 11.5% |
| Completed professional degree | 0.4% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Thornville. Using the proficiency score averages, the average test scores for Thornville, OH schools is 68%. The average student to teacher ratio is n/a. In Thornville, OH, an average of 94.7% of students have completed 8th grade and an average of 94.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Granville, OH | 5,829 | 90% | 87.5% |
| Junction City, OH | 800 | 85% | 76.0% |
| Glenford, OH | 217 | 82% | 70.8% |
| Bremen, OH | 1,477 | 80% | 65.6% |
| Pleasantville, OH | 971 | 80% | 65.6% |
| Thornville, OH | 1,523 | 68% | 41.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Hartington, NE | 1,522 | 55% | 13.5% |
| Kirkland, IL | 1,524 | 20% | 59.4% |
| Valatie, NY | 1,525 | 68% | 42.4% |
| Nashville, IN | 1,521 | 52% | 7.8% |
| Sibley, LA | 1,521 | 72% | 49.0% |
| Thornville, OH | 1,523 | 68% | 41.3% |
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