| Index | Mermentau | Louisiana | National |
| Average Test Scores | 87% | 66% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,334 | 79,221 |
| Total private schools | n/a | 395 | 24,874 |
| Total post-secondary schools | n/a | 175 | 7,963 |
| Index | Mermentau | Louisiana | National |
| Completed 8th grade | 69.9% | 80.2% | 84.3% |
| Completed high school | 61.5% | 78.5% | 83.0% |
| Completed some college | 26.8% | 49.9% | 59.4% |
| Completed associate degree | 13.9% | 28.6% | 38.5% |
| Completed bachelors | 10.5% | 23.0% | 30.3% |
| Completed masters | 9.1% | 7.9% | 11.5% |
| Completed professional degree | 2.9% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Mermentau. Using the proficiency score averages, the average test scores for Mermentau, LA schools is 87%. The average student to teacher ratio is n/a. In Mermentau, LA, an average of 69.9% of students have completed 8th grade and an average of 61.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Egan, LA | 1,002 | 94% | 94.8% |
| Gueydan, LA | 1,184 | 86% | 78.6% |
| Estherwood, LA | 676 | 85% | 76.0% |
| Morse, LA | 1,239 | 85% | 76.0% |
| Iota, LA | 1,752 | 84% | 74.0% |
| Mermentau, LA | 616 | 87% | 81.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Alexander, NY | 616 | 47% | 1.6% |
| Sharon Springs, NY | 616 | 47% | 2.1% |
| Newton Grove, NC | 616 | 47% | 1.8% |
| North Powder, OR | 616 | 35% | 28.1% |
| Clayton, OK | 616 | 26% | 45.8% |
| Mermentau, LA | 616 | 87% | 81.3% |
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