| Index | Clay | West Virginia | National |
| Average Test Scores | n/a | n/a | 48% |
| Student/Teacher ratio | n/a | 15:1 | 16:1 |
| Total public schools | n/a | 509 | 79,221 |
| Total private schools | n/a | 115 | 24,874 |
| Total post-secondary schools | n/a | 78 | 7,963 |

| Index | Clay | West Virginia | National |
| Completed 8th grade | 71.4% | 80.9% | 84.3% |
| Completed high school | 64.0% | 78.6% | 83.0% |
| Completed some college | 23.6% | 44.9% | 59.4% |
| Completed associate degree | 12.3% | 26.3% | 38.5% |
| Completed bachelors | 11.0% | 19.6% | 30.3% |
| Completed masters | 6.0% | 7.7% | 11.5% |
| Completed professional degree | 0.0% | 2.1% | 3.3% |
| Completed doctorate | 0.0% | 0.8% | 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, WV schools is n/a. The average student to teacher ratio is n/a. In Clay, WV, an average of 71.4% of students have completed 8th grade and an average of 64.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clay, WV | 737 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Hardin, TX | 737 | 42% | 11.8% |
| Edgemont, SD | 737 | 42% | 12.0% |
| Glen Ullin, ND | 737 | 50% | 3.6% |
| Chazy, NY | 737 | 67% | 39.6% |
| Hanover, IL | 737 | 43% | 10.4% |
| Clay, WV | 737 | n/a |