| 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 | 31,684 | 87% | 80.7% |
| Westlake, TX | 1,511 | 85% | 77.1% |
| Trophy Club, TX | 11,904 | 75% | 55.2% |
| Flower Mound, TX | 78,854 | 73% | 52.8% |
| Argyle, TX | 4,278 | 71% | 48.4% |
| Justin, TX | 4,125 | 55% | 13.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Sharpsville, PA | 4,125 | 69% | 44.4% |
| Butler, MO | 4,125 | 42% | 13.0% |
| Waverly, TN | 4,124 | 36% | 24.3% |
| Randleman, NC | 4,124 | 41% | 14.3% |
| Dewey-Humboldt, AZ | 4,123 | 57% | 17.7% |
| Justin, TX | 4,125 | 55% | 13.8% |
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