| Index | Dilley | Texas | National |
| Average Test Scores | 32% | 47% | 48% |
| Student/Teacher ratio | 10:1 | 14:1 | 16:1 |
| Total public schools | 4 | 7,418 | 79,221 |
| Total private schools | 1 | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Dilley | Texas | National |
| Completed 8th grade | 49.6% | 79.3% | 84.3% |
| Completed high school | 47.0% | 77.8% | 83.0% |
| Completed some college | 23.8% | 57.3% | 59.4% |
| Completed associate degree | 7.9% | 34.9% | 38.5% |
| Completed bachelors | 3.0% | 28.1% | 30.3% |
| Completed masters | 0.1% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of 4 public schools, 1 private schools and n/a post-secondary schools in Dilley. Using the proficiency score averages, the average test scores for Dilley, TX schools is 32%. The average student to teacher ratio is 10:1. In Dilley, TX, an average of 49.6% of students have completed 8th grade and an average of 47.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Dilley, TX | 4,441 | 32% | 34.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Armonk, NY | 4,440 | 86% | 78.8% |
| Beecher, IL | 4,443 | 35% | 27.1% |
| Lebanon, IL | 4,443 | 26% | 45.8% |
| Winfield, AL | 4,443 | 61% | 26.7% |
| Seven Lakes, NC | 4,438 | 64% | 33.3% |
| Dilley, TX | 4,441 | 32% | 34.4% |
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