| Index | Mifflin | Pennsylvania | National |
| Average Test Scores | n/a | 55% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 2,563 | 79,221 |
| Total private schools | n/a | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Mifflin | Pennsylvania | National |
| Completed 8th grade | 75.4% | 86.9% | 84.3% |
| Completed high school | 73.4% | 85.6% | 83.0% |
| Completed some college | 22.2% | 53.6% | 59.4% |
| Completed associate degree | 17.2% | 37.4% | 38.5% |
| Completed bachelors | 12.6% | 29.3% | 30.3% |
| Completed masters | 4.9% | 11.5% | 11.5% |
| Completed professional degree | 0.0% | 3.3% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 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, PA schools is n/a. The average student to teacher ratio is n/a. In Mifflin, PA, an average of 75.4% of students have completed 8th grade and an average of 73.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Strodes Mills, PA | 1,184 | 65% | 35.4% |
| Millerstown, PA | 699 | 64% | 33.0% |
| Beaver Springs, PA | 779 | 60% | 24.0% |
| Newport, PA | 1,661 | 55% | 14.9% |
| Bloomfield, PA | 1,268 | 55% | 14.6% |
| Mifflin, PA | 381 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Harrington, WA | 381 | 43% | 11.5% |
| Donahue, IA | 381 | 72% | 50.0% |
| Mesick, MI | 381 | 31% | 34.7% |
| Bowdle, SD | 381 | 47% | 2.8% |
| Pillager, MN | 382 | 52% | 8.1% |
| Mifflin, PA | 381 | n/a |
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