| Index | Clayton | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Clayton | Iowa | National |
| Completed 8th grade | 76.9% | 89.2% | 84.3% |
| Completed high school | 74.4% | 87.7% | 83.0% |
| Completed some college | 43.6% | 59.8% | 59.4% |
| Completed associate degree | 38.5% | 38.4% | 38.5% |
| Completed bachelors | 23.1% | 27.2% | 30.3% |
| Completed masters | 12.8% | 8.7% | 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 Clayton. Using the proficiency score averages, the average test scores for Clayton, IA schools is n/a. The average student to teacher ratio is n/a. In Clayton, IA, an average of 76.9% of students have completed 8th grade and an average of 74.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Garnavillo, IA | 815 | 71% | 48.3% |
| Monona, IA | 1,639 | 70% | 45.8% |
| Guttenberg, IA | 1,689 | 70% | 45.8% |
| McGregor, IA | 837 | 66% | 37.0% |
| Elkader, IA | 1,362 | 62% | 29.7% |
| Clayton, IA | 68 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Winfred, SD | 68 | 60% | 25.0% |
| Ekwok, AK | 68 | 50% | 4.2% |
| Dutch John, UT | 67 | 50% | 4.2% |
| Trona, CA | 69 | 33% | 30.7% |
| Swink, OK | 67 | 22% | 54.2% |
| Clayton, IA | 68 | n/a |
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