| 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 |
| 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 | 789 | 43% | 9.9% |
| Port Gibson, MS | 1,616 | 26% | 45.3% |
| City | Population | Avg. Test Scores | National Avg. |
| De Kalb, TX | 1,616 | 34% | 29.9% |
| Langhorne, PA | 1,616 | 67% | 38.5% |
| East Canton, OH | 1,615 | 64% | 32.6% |
| Middleburg, PA | 1,615 | 57% | 19.1% |
| Samson, AL | 1,615 | 44% | 8.7% |
| Port Gibson, MS | 1,616 | 26% | 45.3% |
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