| Index | Glenn Heights | Texas | National |
| Average Test Scores | 42% | 47% | 48% |
| Student/Teacher ratio | 16:1 | 14:1 | 16:1 |
| Total public schools | 1 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Glenn Heights | Texas | National |
| Completed 8th grade | 80.4% | 79.3% | 84.3% |
| Completed high school | 79.5% | 77.8% | 83.0% |
| Completed some college | 55.1% | 57.3% | 59.4% |
| Completed associate degree | 25.7% | 34.9% | 38.5% |
| Completed bachelors | 19.9% | 28.1% | 30.3% |
| Completed masters | 7.8% | 9.6% | 11.5% |
| Completed professional degree | 1.5% | 2.6% | 3.3% |
| Completed doctorate | 0.6% | 1.1% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Glenn Heights. Using the proficiency score averages, the average test scores for Glenn Heights, TX schools is 42%. The average student to teacher ratio is 16:1. In Glenn Heights, TX, an average of 80.4% of students have completed 8th grade and an average of 79.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Ovilla, TX | 4,155 | 64% | 32.3% |
| Palmer, TX | 2,594 | 55% | 15.3% |
| Midlothian, TX | 32,750 | 55% | 13.8% |
| Waxahachie, TX | 38,021 | 52% | 8.6% |
| Red Oak, TX | 13,428 | 48% | 0.9% |
| Glenn Heights, TX | 13,529 | 42% | 11.7% |
| City | Population | Avg. Test Scores | National Avg. |
| San Marino, CA | 13,535 | 88% | 84.1% |
| Worthington, MN | 13,520 | 38% | 21.9% |
| Harrison, AR | 13,520 | 62% | 29.6% |
| Avenal, CA | 13,541 | 26% | 45.6% |
| Coatesville, PA | 13,546 | 33% | 31.7% |
| Glenn Heights, TX | 13,529 | 42% | 11.7% |
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