| Index | Gretna | Nebraska | National |
| Average Test Scores | 70% | 53% | 48% |
| Student/Teacher ratio | 16:1 | 13:1 | 16:1 |
| Total public schools | 3 | 780 | 79,221 |
| Total private schools | n/a | 182 | 24,874 |
| Total post-secondary schools | n/a | 56 | 7,963 |
| Index | Gretna | Nebraska | National |
| Completed 8th grade | 92.8% | 88.4% | 84.3% |
| Completed high school | 92.0% | 87.2% | 83.0% |
| Completed some college | 71.7% | 63.7% | 59.4% |
| Completed associate degree | 48.4% | 40.1% | 38.5% |
| Completed bachelors | 38.4% | 30.0% | 30.3% |
| Completed masters | 13.1% | 9.9% | 11.5% |
| Completed professional degree | 2.8% | 2.9% | 3.3% |
| Completed doctorate | 0.8% | 1.2% | 1.3% |
There are a total of 3 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, NE schools is 70%. The average student to teacher ratio is 16:1. In Gretna, NE, an average of 92.8% of students have completed 8th grade and an average of 92.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Murdock, NE | 177 | 72% | 50.0% |
| Springfield, NE | 1,582 | 68% | 41.3% |
| Yutan, NE | 1,075 | 65% | 34.4% |
| Valley, NE | 2,834 | 62% | 28.1% |
| Papillion, NE | 24,310 | 61% | 28.0% |
| Gretna, NE | 5,039 | 70% | 45.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Rainsville, AL | 5,038 | 45% | 7.3% |
| Mattawa, WA | 5,040 | 23% | 52.7% |
| Maize, KS | 5,044 | 49% | 1.9% |
| Crestwood, KY | 5,034 | 65% | 35.4% |
| Polson, MT | 5,033 | 35% | 27.1% |
| Gretna, NE | 5,039 | 70% | 45.6% |
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