| Index | Millfield | Ohio | National |
| Average Test Scores | n/a | 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 | Millfield | Ohio | National |
| Completed 8th grade | 80.6% | 86.9% | 84.3% |
| Completed high school | 77.3% | 85.6% | 83.0% |
| Completed some college | 16.4% | 55.7% | 59.4% |
| Completed associate degree | 5.3% | 35.1% | 38.5% |
| Completed bachelors | 0.0% | 26.7% | 30.3% |
| Completed masters | 0.0% | 10.0% | 11.5% |
| Completed professional degree | 0.0% | 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 Millfield. Using the proficiency score averages, the average test scores for Millfield, OH schools is n/a. The average student to teacher ratio is n/a. In Millfield, OH, an average of 80.6% of students have completed 8th grade and an average of 77.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Malta, OH | 647 | 75% | 55.2% |
| Albany, OH | 955 | 70% | 45.8% |
| Athens, OH | 24,978 | 69% | 42.7% |
| Stewart, OH | 326 | 57% | 17.7% |
| The Plains, OH | 2,813 | 54% | 13.0% |
| Millfield, OH | 293 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Channing, TX | 293 | 42% | 12.5% |
| Lower Kalskag, AK | 293 | 10% | 79.2% |
| Darrouzett, TX | 293 | 30% | 38.5% |
| Elfrida, AZ | 293 | 37% | 22.4% |
| Alta, WY | 294 | 75% | 56.3% |
| Millfield, OH | 293 | n/a |
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