| 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 |
| 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 | 529 | 52% | 8.9% |
| Shannon, IL | 745 | 50% | 3.1% |
| Lanark, IL | 1,453 | 47% | 2.1% |
| Forreston, IL | 1,392 | 41% | 14.6% |
| Polo, IL | 2,210 | 39% | 19.1% |
| Milledgeville, IL | 987 | 35% | 27.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Shelby, AL | 987 | 55% | 13.5% |
| Kenmare, ND | 987 | 46% | 4.2% |
| De Soto, IA | 987 | 71% | 47.9% |
| Wink, TX | 987 | 41% | 15.1% |
| Sharon Springs, KS | 987 | 41% | 14.6% |
| Milledgeville, IL | 987 | 35% | 27.1% |
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