| Index | Mifflin | 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 | Mifflin | Ohio | National |
| Completed 8th grade | 71.7% | 86.9% | 84.3% |
| Completed high school | 71.7% | 85.6% | 83.0% |
| Completed some college | 44.6% | 55.7% | 59.4% |
| Completed associate degree | 25.0% | 35.1% | 38.5% |
| Completed bachelors | 7.6% | 26.7% | 30.3% |
| Completed masters | 4.3% | 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 Mifflin. Using the proficiency score averages, the average test scores for Mifflin, OH schools is n/a. The average student to teacher ratio is n/a. In Mifflin, OH, an average of 71.7% of students have completed 8th grade and an average of 71.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lexington, OH | 4,937 | 81% | 68.5% |
| Butler, OH | 858 | 75% | 55.2% |
| Hayesville, OH | 489 | 75% | 55.2% |
| Ontario, OH | 6,094 | 71% | 46.9% |
| Jeromesville, OH | 590 | 69% | 44.3% |
| Mifflin, OH | 190 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Plaucheville, LA | 190 | 63% | 31.3% |
| Caledonia, MO | 190 | 40% | 17.7% |
| Stony Creek, VA | 190 | 83% | 72.9% |
| Ruby, AK | 190 | 25% | 47.9% |
| Stockett, MT | 189 | 50% | 4.2% |
| Mifflin, OH | 190 | n/a |
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