| Index | Terrell Hills | Texas | National |
| Average Test Scores | n/a | 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 | Terrell Hills | Texas | National |
| Completed 8th grade | 98.6% | 79.3% | 84.3% |
| Completed high school | 98.6% | 77.8% | 83.0% |
| Completed some college | 94.1% | 57.3% | 59.4% |
| Completed associate degree | 79.9% | 34.9% | 38.5% |
| Completed bachelors | 78.0% | 28.1% | 30.3% |
| Completed masters | 36.1% | 9.6% | 11.5% |
| Completed professional degree | 17.2% | 2.6% | 3.3% |
| Completed doctorate | 2.6% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Terrell Hills. Using the proficiency score averages, the average test scores for Terrell Hills, TX schools is n/a. The average student to teacher ratio is n/a. In Terrell Hills, TX, an average of 98.6% of students have completed 8th grade and an average of 98.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Castle Hills, TX | 4,632 | 85% | 76.0% |
| Live Oak, TX | 16,631 | 83% | 72.4% |
| Helotes, TX | 9,720 | 69% | 44.4% |
| Randolph AFB, TX | 1,228 | 66% | 36.8% |
| Garden Ridge, TX | 4,164 | 66% | 36.5% |
| Terrell Hills, TX | 5,567 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Cottleville, MO | 5,566 | 69% | 43.1% |
| Davenport, FL | 5,569 | 52% | 7.4% |
| Cottonwood, CA | 5,564 | 46% | 3.5% |
| Emporia, VA | 5,571 | 64% | 32.8% |
| Chelsea, MI | 5,563 | 65% | 36.1% |
| Terrell Hills, TX | 5,567 | n/a |
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