| Index | Gardendale | Alabama | National |
| Average Test Scores | 48% | 44% | 48% |
| Student/Teacher ratio | 15:1 | 15:1 | 16:1 |
| Total public schools | 4 | 1,307 | 79,221 |
| Total private schools | 3 | 353 | 24,874 |
| Total post-secondary schools | n/a | 102 | 7,963 |
| Index | Gardendale | Alabama | National |
| Completed 8th grade | 89.5% | 80.7% | 84.3% |
| Completed high school | 88.7% | 79.2% | 83.0% |
| Completed some college | 60.3% | 53.8% | 59.4% |
| Completed associate degree | 37.8% | 31.9% | 38.5% |
| Completed bachelors | 27.0% | 24.0% | 30.3% |
| Completed masters | 10.4% | 8.9% | 11.5% |
| Completed professional degree | 4.0% | 2.5% | 3.3% |
| Completed doctorate | 1.0% | 1.0% | 1.3% |
There are a total of 4 public schools, 3 private schools and n/a post-secondary schools in Gardendale. Using the proficiency score averages, the average test scores for Gardendale, AL schools is 48%. The average student to teacher ratio is 15:1. In Gardendale, AL, an average of 89.5% of students have completed 8th grade and an average of 88.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mountain Brook, AL | 20,178 | 86% | 79.5% |
| Trussville, AL | 22,590 | 67% | 38.7% |
| Mount Olive, AL | 4,052 | 57% | 18.8% |
| Kimberly, AL | 3,551 | 52% | 8.9% |
| West Jefferson, AL | 462 | 52% | 8.3% |
| Gardendale, AL | 14,021 | 48% | 0.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Hendersonville, NC | 14,020 | 53% | 10.5% |
| Chicago Ridge, IL | 14,028 | 19% | 61.1% |
| Lewisville, NC | 14,030 | 72% | 50.0% |
| East Wenatchee, WA | 14,012 | 55% | 14.3% |
| Cahokia, IL | 14,035 | 7% | 86.0% |
| Gardendale, AL | 14,021 | 48% | 0.3% |
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