| Index | Marydel | Maryland | National |
| Average Test Scores | n/a | 40% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 1,163 | 79,221 |
| Total private schools | n/a | 674 | 24,874 |
| Total post-secondary schools | n/a | 112 | 7,963 |
| Index | Marydel | Maryland | National |
| Completed 8th grade | 45.6% | 87.5% | 84.3% |
| Completed high school | 42.5% | 86.5% | 83.0% |
| Completed some college | 16.6% | 64.2% | 59.4% |
| Completed associate degree | 6.7% | 44.8% | 38.5% |
| Completed bachelors | 3.6% | 38.4% | 30.3% |
| Completed masters | 3.1% | 17.7% | 11.5% |
| Completed professional degree | 0.0% | 5.5% | 3.3% |
| Completed doctorate | 0.0% | 2.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Marydel. Using the proficiency score averages, the average test scores for Marydel, MD schools is n/a. The average student to teacher ratio is n/a. In Marydel, MD, an average of 45.6% of students have completed 8th grade and an average of 42.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hartly, DE | 167 | 62% | 29.2% |
| Church Hill, MD | 866 | 57% | 18.8% |
| Felton, DE | 1,191 | 56% | 17.0% |
| Clayton, DE | 3,393 | 51% | 7.0% |
| Harrington, DE | 3,658 | 51% | 6.3% |
| Marydel, MD | 241 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Tipton, KS | 241 | 70% | 45.8% |
| Oak Ridge, MO | 241 | 35% | 28.1% |
| Oakdale, TN | 241 | 21% | 57.3% |
| Bassfield, MS | 241 | 30% | 38.5% |
| Sunbury, NC | 241 | 25% | 49.0% |
| Marydel, MD | 241 | n/a |
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