| Index | Millen | Georgia | National |
| Average Test Scores | 28% | 42% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 4 | 2,164 | 79,221 |
| Total private schools | n/a | 515 | 24,874 |
| Total post-secondary schools | n/a | 192 | 7,963 |
| Index | Millen | Georgia | National |
| Completed 8th grade | 67.3% | 82.3% | 84.3% |
| Completed high school | 64.5% | 81.0% | 83.0% |
| Completed some college | 25.6% | 57.8% | 59.4% |
| Completed associate degree | 14.2% | 36.8% | 38.5% |
| Completed bachelors | 11.2% | 29.4% | 30.3% |
| Completed masters | 2.2% | 11.1% | 11.5% |
| Completed professional degree | 0.7% | 3.2% | 3.3% |
| Completed doctorate | 0.0% | 1.3% | 1.3% |
There are a total of 4 public schools, n/a private schools and n/a post-secondary schools in Millen. Using the proficiency score averages, the average test scores for Millen, GA schools is 28%. The average student to teacher ratio is 15:1. In Millen, GA, an average of 67.3% of students have completed 8th grade and an average of 64.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sardis, GA | 978 | 37% | 22.9% |
| Millen, GA | 2,799 | 28% | 41.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Carson, WA | 2,800 | 39% | 19.8% |
| New Bremen, OH | 2,798 | 87% | 81.8% |
| Bethel, OH | 2,797 | 70% | 46.2% |
| Ford City, PA | 2,797 | 51% | 6.8% |
| Grottoes, VA | 2,797 | 85% | 76.0% |
| Millen, GA | 2,799 | 28% | 41.3% |
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