| Index | Castle Hills | Texas | National |
| Average Test Scores | 85% | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Castle Hills | Texas | National |
| Completed 8th grade | 91.3% | 79.3% | 84.3% |
| Completed high school | 89.5% | 77.8% | 83.0% |
| Completed some college | 79.7% | 57.3% | 59.4% |
| Completed associate degree | 56.3% | 34.9% | 38.5% |
| Completed bachelors | 48.9% | 28.1% | 30.3% |
| Completed masters | 21.2% | 9.6% | 11.5% |
| Completed professional degree | 9.2% | 2.6% | 3.3% |
| Completed doctorate | 3.5% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castle Hills. Using the proficiency score averages, the average test scores for Castle Hills, TX schools is 85%. The average student to teacher ratio is n/a. In Castle Hills, TX, an average of 91.3% of students have completed 8th grade and an average of 89.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Live Oak, TX | 16,118 | 83% | 72.4% |
| Helotes, TX | 9,525 | 69% | 44.4% |
| Randolph AFB, TX | 1,188 | 66% | 36.8% |
| Garden Ridge, TX | 4,054 | 66% | 36.5% |
| Leon Valley, TX | 12,279 | 55% | 13.5% |
| Castle Hills, TX | 4,459 | 85% | 76.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Amite City, LA | 4,459 | 40% | 17.7% |
| Pilot Point, TX | 4,457 | 49% | 2.1% |
| East Palestine, OH | 4,457 | 66% | 37.8% |
| Fabens, TX | 4,462 | 47% | 2.1% |
| Manlius, NY | 4,456 | 85% | 76.4% |
| Castle Hills, TX | 4,459 | 85% | 76.0% |
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