| Index | Posen | Illinois | National |
| Average Test Scores | 25% | 33% | 48% |
| Student/Teacher ratio | 23:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Posen | Illinois | National |
| Completed 8th grade | 75.7% | 86.2% | 84.3% |
| Completed high school | 71.2% | 84.7% | 83.0% |
| Completed some college | 35.8% | 61.8% | 59.4% |
| Completed associate degree | 16.7% | 40.7% | 38.5% |
| Completed bachelors | 11.0% | 32.9% | 30.3% |
| Completed masters | 2.3% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Posen. Using the proficiency score averages, the average test scores for Posen, IL schools is 25%. The average student to teacher ratio is 23:1. In Posen, IL, an average of 75.7% of students have completed 8th grade and an average of 71.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Oak Brook, IL | 8,085 | 79% | 64.6% |
| Clarendon Hills, IL | 8,834 | 77% | 59.4% |
| Hinsdale, IL | 17,366 | 74% | 54.7% |
| Western Springs, IL | 13,247 | 74% | 54.4% |
| Munster, IN | 22,604 | 70% | 46.0% |
| Posen, IL | 5,772 | 25% | 49.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Leesville, LA | 5,773 | 77% | 60.7% |
| Central City, KY | 5,770 | 52% | 8.3% |
| Penn Wynne, PA | 5,769 | 87% | 81.3% |
| Finderne, NJ | 5,775 | 59% | 22.9% |
| Jamul, CA | 5,776 | 46% | 4.7% |
| Posen, IL | 5,772 | 25% | 49.0% |
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