| Index | Gretna | Louisiana | National |
| Average Test Scores | 65% | 66% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 9 | 1,334 | 79,221 |
| Total private schools | 7 | 395 | 24,874 |
| Total post-secondary schools | 3 | 175 | 7,963 |
| Index | Gretna | Louisiana | National |
| Completed 8th grade | 75.1% | 80.2% | 84.3% |
| Completed high school | 72.6% | 78.5% | 83.0% |
| Completed some college | 43.6% | 49.9% | 59.4% |
| Completed associate degree | 21.5% | 28.6% | 38.5% |
| Completed bachelors | 16.8% | 23.0% | 30.3% |
| Completed masters | 5.8% | 7.9% | 11.5% |
| Completed professional degree | 2.0% | 2.6% | 3.3% |
| Completed doctorate | 0.8% | 1.0% | 1.3% |
There are a total of 9 public schools, 7 private schools and 3 post-secondary schools in Gretna. Using the proficiency score averages, the average test scores for Gretna, LA schools is 65%. The average student to teacher ratio is 15:1. In Gretna, LA, an average of 75.1% of students have completed 8th grade and an average of 72.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Belle Chasse, LA | 10,241 | 86% | 78.1% |
| Harahan, LA | 9,293 | 80% | 66.7% |
| Meraux, LA | 8,187 | 77% | 60.4% |
| Poydras, LA | 2,506 | 73% | 51.6% |
| River Ridge, LA | 13,690 | 72% | 50.0% |
| Gretna, LA | 17,746 | 65% | 34.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Maitland, FL | 17,749 | 65% | 34.9% |
| Lackawanna, NY | 17,751 | 54% | 11.5% |
| Ocean Springs, MS | 17,756 | 61% | 27.6% |
| Selma, AL | 17,762 | 25% | 47.4% |
| Elizabeth City, NC | 17,725 | 33% | 30.9% |
| Gretna, LA | 17,746 | 65% | 34.9% |
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