| Index | Clay | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Clay | California | National |
| Completed 8th grade | 83.9% | 81.1% | 84.3% |
| Completed high school | 82.8% | 79.8% | 83.0% |
| Completed some college | 61.3% | 61.5% | 59.4% |
| Completed associate degree | 35.4% | 39.8% | 38.5% |
| Completed bachelors | 23.9% | 32.0% | 30.3% |
| Completed masters | 9.0% | 11.9% | 11.5% |
| Completed professional degree | 4.4% | 3.9% | 3.3% |
| Completed doctorate | 0.6% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Clay. Using the proficiency score averages, the average test scores for Clay, CA schools is n/a. The average student to teacher ratio is n/a. In Clay, CA, an average of 83.9% of students have completed 8th grade and an average of 82.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Wilton, CA | 5,224 | 63% | 31.3% |
| Elk Grove, CA | 173,370 | 53% | 11.1% |
| Herald, CA | 1,049 | 48% | = 100 |
| Galt, CA | 26,235 | 43% | 10.9% |
| Lockeford, CA | 3,572 | 40% | 16.7% |
| Clay, CA | 1,130 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Leetsdale, PA | 1,130 | 85% | 76.0% |
| Webster, FL | 1,130 | 53% | 10.9% |
| Moreauville, LA | 1,130 | 48% | 1.0% |
| Rowland, NC | 1,130 | 18% | 62.2% |
| Broxton, GA | 1,129 | 40% | 17.7% |
| Clay, CA | 1,130 | n/a |
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