| Index | Millsboro | 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 | Millsboro | Pennsylvania | National |
| Completed 8th grade | 90.0% | 86.9% | 84.3% |
| Completed high school | 88.9% | 85.6% | 83.0% |
| Completed some college | 49.4% | 53.6% | 59.4% |
| Completed associate degree | 28.3% | 37.4% | 38.5% |
| Completed bachelors | 20.4% | 29.3% | 30.3% |
| Completed masters | 5.7% | 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 Millsboro. Using the proficiency score averages, the average test scores for Millsboro, PA schools is n/a. The average student to teacher ratio is n/a. In Millsboro, PA, an average of 90.0% of students have completed 8th grade and an average of 88.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Eighty Four, PA | 345 | 80% | 65.6% |
| Monongahela, PA | 4,142 | 65% | 35.1% |
| Bentleyville, PA | 2,466 | 61% | 27.8% |
| Belle Vernon, PA | 952 | 61% | 26.3% |
| Washington, PA | 13,404 | 60% | 25.5% |
| Millsboro, PA | 503 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| New Albin, IA | 503 | 90% | 86.5% |
| Eagletown, OK | 503 | 32% | 32.8% |
| Foxworth, MS | 503 | 54% | 12.5% |
| Stonewall, OK | 503 | 39% | 19.1% |
| Sterling, NE | 502 | 58% | 19.8% |
| Millsboro, PA | 503 | n/a |
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