| Index | Marseilles | Illinois | National |
| Average Test Scores | 30% | 33% | 48% |
| Student/Teacher ratio | 14:1 | 18:1 | 16:1 |
| Total public schools | 2 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Marseilles | Illinois | National |
| Completed 8th grade | 82.9% | 86.2% | 84.3% |
| Completed high school | 81.7% | 84.7% | 83.0% |
| Completed some college | 45.9% | 61.8% | 59.4% |
| Completed associate degree | 14.4% | 40.7% | 38.5% |
| Completed bachelors | 7.0% | 32.9% | 30.3% |
| Completed masters | 1.2% | 12.7% | 11.5% |
| Completed professional degree | 0.4% | 3.4% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Marseilles. Using the proficiency score averages, the average test scores for Marseilles, IL schools is 30%. The average student to teacher ratio is 14:1. In Marseilles, IL, an average of 82.9% of students have completed 8th grade and an average of 81.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Newark, IL | 1,325 | 50% | 3.5% |
| Grand Ridge, IL | 650 | 50% | 3.1% |
| Morris, IL | 14,420 | 42% | 12.5% |
| Sheridan, IL | 2,829 | 40% | 16.7% |
| Mazon, IL | 1,222 | 40% | 17.2% |
| Marseilles, IL | 4,579 | 30% | 38.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Bridgeport, PA | 4,576 | 40% | 17.7% |
| Ivanhoe, CA | 4,584 | 40% | 17.7% |
| Canastota, NY | 4,572 | 45% | 6.9% |
| Palacios, TX | 4,589 | 48% | 0.3% |
| Haleiwa, HI | 4,589 | 64% | 32.3% |
| Marseilles, IL | 4,579 | 30% | 38.5% |
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