| Index | Castleberry | Alabama | National |
| Average Test Scores | 25% | 44% | 48% |
| Student/Teacher ratio | n/a | 15:1 | 16:1 |
| Total public schools | n/a | 1,307 | 79,221 |
| Total private schools | n/a | 353 | 24,874 |
| Total post-secondary schools | n/a | 102 | 7,963 |
| Index | Castleberry | Alabama | National |
| Completed 8th grade | 72.1% | 80.7% | 84.3% |
| Completed high school | 68.6% | 79.2% | 83.0% |
| Completed some college | 37.0% | 53.8% | 59.4% |
| Completed associate degree | 21.5% | 31.9% | 38.5% |
| Completed bachelors | 9.1% | 24.0% | 30.3% |
| Completed masters | 1.0% | 8.9% | 11.5% |
| Completed professional degree | 0.0% | 2.5% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castleberry. Using the proficiency score averages, the average test scores for Castleberry, AL schools is 25%. The average student to teacher ratio is n/a. In Castleberry, AL, an average of 72.1% of students have completed 8th grade and an average of 68.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Brewton, AL | 5,210 | 55% | 15.4% |
| East Brewton, AL | 3,093 | 45% | 7.3% |
| Repton, AL | 440 | 35% | 28.1% |
| Evergreen, AL | 3,591 | 30% | 37.5% |
| Castleberry, AL | 426 | 25% | 49.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Gaines, MI | 426 | 40% | 17.7% |
| Nelson, NE | 426 | 58% | 19.8% |
| Ludlow, IL | 426 | 30% | 37.5% |
| Creedmoor, TX | 426 | 29% | 40.6% |
| Kwigillingok, AK | 425 | 5% | 89.6% |
| Castleberry, AL | 426 | 25% | 49.0% |
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