| Index | Clay | Pennsylvania | National |
| Average Test Scores | n/a | 55% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 2,563 | 79,221 |
| Total private schools | n/a | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Clay | Pennsylvania | National |
| Completed 8th grade | 80.3% | 86.9% | 84.3% |
| Completed high school | 71.1% | 85.6% | 83.0% |
| Completed some college | 38.6% | 53.6% | 59.4% |
| Completed associate degree | 31.4% | 37.4% | 38.5% |
| Completed bachelors | 26.1% | 29.3% | 30.3% |
| Completed masters | 9.7% | 11.5% | 11.5% |
| Completed professional degree | 0.5% | 3.3% | 3.3% |
| Completed doctorate | 0.5% | 1.4% | 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, PA schools is n/a. The average student to teacher ratio is n/a. In Clay, PA, an average of 80.3% of students have completed 8th grade and an average of 71.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Millersville, PA | 8,309 | 74% | 54.7% |
| West Lawn, PA | 1,547 | 72% | 50.0% |
| Washington Boro, PA | 881 | 72% | 49.0% |
| Brownstown, PA | 3,160 | 70% | 44.8% |
| Wernersville, PA | 2,757 | 70% | 44.8% |
| Clay, PA | 1,665 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Oakland, IA | 1,665 | 70% | 45.3% |
| Caddo Mills, TX | 1,666 | 64% | 33.3% |
| Lumberton, MS | 1,664 | 38% | 21.4% |
| Milford, IN | 1,664 | 42% | 12.5% |
| Stedman, NC | 1,666 | 56% | 15.6% |
| Clay, PA | 1,665 | n/a |
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