| Index | Clayton | California | National |
| Average Test Scores | 63% | 43% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 3 | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
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| Index | Clayton | California | National |
| Completed 8th grade | 96.7% | 81.1% | 84.3% |
| Completed high school | 96.7% | 79.8% | 83.0% |
| Completed some college | 86.0% | 61.5% | 59.4% |
| Completed associate degree | 63.2% | 39.8% | 38.5% |
| Completed bachelors | 54.3% | 32.0% | 30.3% |
| Completed masters | 17.1% | 11.9% | 11.5% |
| Completed professional degree | 4.3% | 3.9% | 3.3% |
| Completed doctorate | 0.8% | 1.6% | 1.3% |
There are a total of 3 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, CA schools is 63%. The average student to teacher ratio is 21:1. In Clayton, CA, an average of 96.7% of students have completed 8th grade and an average of 96.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Orinda, CA | 19,891 | 87% | 81.4% |
| Moraga, CA | 17,346 | 84% | 75.2% |
| Lafayette, CA | 26,574 | 83% | 73.8% |
| San Ramon, CA | 83,423 | 78% | 62.9% |
| Danville, CA | 46,118 | 75% | 56.1% |
| Clayton, CA | 11,862 | 63% | 31.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Mexico, MO | 11,861 | 39% | 19.8% |
| Signal Hill, CA | 11,866 | 52% | 8.3% |
| Cedarburg, WI | 11,850 | 68% | 40.8% |
| Bacliff, TX | 11,876 | 43% | 10.4% |
| Mountain Top, PA | 11,844 | 68% | 42.0% |
| Clayton, CA | 11,862 | 63% | 31.8% |
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