| Index | Justin | Texas | National |
| Average Test Scores | 55% | 47% | 48% |
| Student/Teacher ratio | 16:1 | 14:1 | 16:1 |
| Total public schools | 6 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Justin | Texas | National |
| Completed 8th grade | 85.5% | 79.3% | 84.3% |
| Completed high school | 84.2% | 77.8% | 83.0% |
| Completed some college | 63.5% | 57.3% | 59.4% |
| Completed associate degree | 35.0% | 34.9% | 38.5% |
| Completed bachelors | 27.7% | 28.1% | 30.3% |
| Completed masters | 7.5% | 9.6% | 11.5% |
| Completed professional degree | 2.4% | 2.6% | 3.3% |
| Completed doctorate | 0.8% | 1.1% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Justin. Using the proficiency score averages, the average test scores for Justin, TX schools is 55%. The average student to teacher ratio is 16:1. In Justin, TX, an average of 85.5% of students have completed 8th grade and an average of 84.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Southlake, TX | 29,101 | 87% | 80.2% |
| Westlake, TX | 1,124 | 85% | 76.6% |
| Trophy Club, TX | 10,987 | 75% | 54.8% |
| Flower Mound, TX | 69,966 | 73% | 52.4% |
| Argyle, TX | 3,732 | 71% | 48.0% |
| Justin, TX | 3,422 | 55% | 13.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Story City, IA | 3,423 | 86% | 78.2% |
| Gibson City, IL | 3,423 | 44% | 8.2% |
| Port St. Joe, FL | 3,424 | 53% | 9.6% |
| Prince Frederick, MD | 3,425 | 43% | 11.1% |
| Essexville, MI | 3,418 | 41% | 14.0% |
| Justin, TX | 3,422 | 55% | 13.5% |
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