| Index | Port Gibson | Mississippi | National |
| Average Test Scores | 26% | 40% | 48% |
| Student/Teacher ratio | 14:1 | 16:1 | 16:1 |
| Total public schools | 4 | 893 | 79,221 |
| Total private schools | 2 | 206 | 24,874 |
| Total post-secondary schools | n/a | 68 | 7,963 |
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| Index | Port Gibson | Mississippi | National |
| Completed 8th grade | 77.9% | 78.6% | 84.3% |
| Completed high school | 73.3% | 76.7% | 83.0% |
| Completed some college | 53.4% | 52.5% | 59.4% |
| Completed associate degree | 33.1% | 29.8% | 38.5% |
| Completed bachelors | 28.8% | 21.0% | 30.3% |
| Completed masters | 13.3% | 7.9% | 11.5% |
| Completed professional degree | 4.1% | 2.2% | 3.3% |
| Completed doctorate | 0.5% | 0.9% | 1.3% |
There are a total of 4 public schools, 2 private schools and n/a post-secondary schools in Port Gibson. Using the proficiency score averages, the average test scores for Port Gibson, MS schools is 26%. The average student to teacher ratio is 14:1. In Port Gibson, MS, an average of 77.9% of students have completed 8th grade and an average of 73.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Joseph, LA | 821 | 43% | 9.9% |
| Port Gibson, MS | 1,667 | 26% | 45.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Lookout Mountain, GA | 1,667 | 85% | 76.0% |
| Decatur, TN | 1,667 | 34% | 28.9% |
| South Bend, WA | 1,667 | 45% | 7.3% |
| Coldwater, MS | 1,668 | 28% | 41.4% |
| Port Barre, LA | 1,666 | 79% | 65.3% |
| Port Gibson, MS | 1,667 | 26% | 45.3% |
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