| Index | Mill Creek | Illinois | National |
| Average Test Scores | n/a | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 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 | Mill Creek | Illinois | National |
| Completed 8th grade | 88.6% | 86.2% | 84.3% |
| Completed high school | 88.6% | 84.7% | 83.0% |
| Completed some college | 60.0% | 61.8% | 59.4% |
| Completed associate degree | 17.1% | 40.7% | 38.5% |
| Completed bachelors | 11.4% | 32.9% | 30.3% |
| Completed masters | 0.0% | 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 n/a public schools, n/a private schools and n/a post-secondary schools in Mill Creek. Using the proficiency score averages, the average test scores for Mill Creek, IL schools is n/a. The average student to teacher ratio is n/a. In Mill Creek, IL, an average of 88.6% of students have completed 8th grade and an average of 88.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Jonesboro, IL | 1,772 | 46% | 5.2% |
| Cape Girardeau, MO | 40,100 | 42% | 11.6% |
| Cobden, IL | 1,018 | 31% | 34.7% |
| Anna, IL | 4,149 | 31% | 36.1% |
| Cypress, IL | 216 | 18% | 63.5% |
| Mill Creek, IL | 30 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Creston, CA | 31 | 50% | 4.2% |
| Forbes, ND | 31 | 20% | 58.3% |
| Mosquero, NM | 29 | 50% | 4.2% |
| Raymond, SD | 31 | 50% | 4.2% |
| Gerlach, NV | 28 | 50% | 4.2% |
| Mill Creek, IL | 30 | n/a |
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