| Index | Clayton | Delaware | National |
| Average Test Scores | 51% | 44% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 2 | 191 | 79,221 |
| Total private schools | n/a | 129 | 24,874 |
| Total post-secondary schools | n/a | 20 | 7,963 |
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| Index | Clayton | Delaware | National |
| Completed 8th grade | 83.2% | 86.3% | 84.3% |
| Completed high school | 82.4% | 85.3% | 83.0% |
| Completed some college | 48.0% | 57.7% | 59.4% |
| Completed associate degree | 31.2% | 38.2% | 38.5% |
| Completed bachelors | 24.1% | 30.5% | 30.3% |
| Completed masters | 8.1% | 12.4% | 11.5% |
| Completed professional degree | 1.4% | 3.5% | 3.3% |
| Completed doctorate | 0.4% | 1.7% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Clayton. Using the proficiency score averages, the average test scores for Clayton, DE schools is 51%. The average student to teacher ratio is 15:1. In Clayton, DE, an average of 83.2% of students have completed 8th grade and an average of 82.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hartly, DE | 167 | 62% | 29.2% |
| Townsend, DE | 2,546 | 60% | 25.0% |
| Odessa, DE | 352 | 56% | 16.7% |
| Middletown, DE | 22,350 | 55% | 15.1% |
| Smyrna, DE | 11,694 | 50% | 4.3% |
| Clayton, DE | 3,393 | 51% | 7.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Kenedy, TX | 3,394 | 39% | 19.4% |
| West Sand Lake, NY | 3,391 | 65% | 34.4% |
| Newcastle, WY | 3,395 | 55% | 13.5% |
| Tipton, CA | 3,391 | 37% | 22.9% |
| Mayfield, OH | 3,388 | 80% | 65.6% |
| Clayton, DE | 3,393 | 51% | 7.0% |
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