| Index | Milledgeville | Illinois | National |
| Average Test Scores | 35% | 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 |


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| Index | Milledgeville | Illinois | National |
| Completed 8th grade | 85.2% | 86.2% | 84.3% |
| Completed high school | 84.8% | 84.7% | 83.0% |
| Completed some college | 48.1% | 61.8% | 59.4% |
| Completed associate degree | 25.7% | 40.7% | 38.5% |
| Completed bachelors | 15.3% | 32.9% | 30.3% |
| Completed masters | 5.1% | 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 2 public schools, n/a private schools and n/a post-secondary schools in Milledgeville. Using the proficiency score averages, the average test scores for Milledgeville, IL schools is 35%. The average student to teacher ratio is 14:1. In Milledgeville, IL, an average of 85.2% of students have completed 8th grade and an average of 84.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Chadwick, IL | 544 | 52% | 8.9% |
| Shannon, IL | 763 | 50% | 3.1% |
| Lanark, IL | 1,510 | 47% | 2.1% |
| Forreston, IL | 1,437 | 41% | 14.6% |
| Polo, IL | 2,286 | 39% | 19.1% |
| Milledgeville, IL | 1,014 | 35% | 27.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Tioga, ND | 1,014 | 31% | 35.9% |
| Whitewood, SD | 1,014 | 60% | 25.0% |
| Stamping Ground, KY | 1,014 | 48% | = 100 |
| Carnesville, GA | 1,013 | 43% | 10.4% |
| Schleswig, IA | 1,015 | 74% | 53.1% |
| Milledgeville, IL | 1,014 | 35% | 27.1% |