| Index | Gretna | Virginia | National |
| Average Test Scores | 78% | 79% | 48% |
| Student/Teacher ratio | 12:1 | 13:1 | 16:1 |
| Total public schools | 4 | 1,596 | 79,221 |
| Total private schools | n/a | 553 | 24,874 |
| Total post-secondary schools | n/a | 199 | 7,963 |
| Index | Gretna | Virginia | National |
| Completed 8th grade | 76.0% | 85.9% | 84.3% |
| Completed high school | 69.8% | 84.7% | 83.0% |
| Completed some college | 42.8% | 64.1% | 59.4% |
| Completed associate degree | 18.3% | 44.2% | 38.5% |
| Completed bachelors | 14.6% | 36.9% | 30.3% |
| Completed masters | 8.3% | 15.7% | 11.5% |
| Completed professional degree | 0.7% | 4.2% | 3.3% |
| Completed doctorate | 0.0% | 1.7% | 1.3% |
There are a total of 4 public schools, n/a private schools and n/a post-secondary schools in Gretna. Using the proficiency score averages, the average test scores for Gretna, VA schools is 78%. The average student to teacher ratio is 12:1. In Gretna, VA, an average of 76.0% of students have completed 8th grade and an average of 69.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hurt, VA | 1,457 | 94% | 94.8% |
| Chatham, VA | 1,756 | 86% | 79.4% |
| Altavista, VA | 3,439 | 79% | 65.1% |
| Gretna, VA | 1,434 | 78% | 61.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Manson, WA | 1,433 | 41% | 13.9% |
| Pioche, NV | 1,435 | 45% | 6.3% |
| Waterville, WA | 1,435 | 56% | 16.7% |
| Pleasanton, KS | 1,433 | 23% | 51.6% |
| Tuscarawas, OH | 1,432 | 71% | 46.9% |
| Gretna, VA | 1,434 | 78% | 61.5% |
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