| Index | Mill Creek | Washington | National |
| Average Test Scores | 77% | 54% | 48% |
| Student/Teacher ratio | 21:1 | 20:1 | 16:1 |
| Total public schools | 1 | 1,991 | 79,221 |
| Total private schools | 1 | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Mill Creek | Washington | National |
| Completed 8th grade | 95.1% | 87.5% | 84.3% |
| Completed high school | 95.0% | 86.6% | 83.0% |
| Completed some college | 82.2% | 67.7% | 59.4% |
| Completed associate degree | 60.6% | 43.3% | 38.5% |
| Completed bachelors | 50.0% | 33.6% | 30.3% |
| Completed masters | 18.1% | 12.3% | 11.5% |
| Completed professional degree | 5.8% | 3.6% | 3.3% |
| Completed doctorate | 3.3% | 1.5% | 1.3% |
There are a total of 1 public schools, 1 private schools and n/a post-secondary schools in Mill Creek. Using the proficiency score averages, the average test scores for Mill Creek, WA schools is 77%. The average student to teacher ratio is 21:1. In Mill Creek, WA, an average of 95.1% of students have completed 8th grade and an average of 95.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Redmond, WA | 67,959 | 83% | 73.1% |
| Woodinville, WA | 13,038 | 78% | 62.8% |
| Duvall, WA | 7,979 | 77% | 60.4% |
| Kirkland, WA | 91,146 | 76% | 58.2% |
| Lake Forest Park, WA | 13,455 | 76% | 57.3% |
| Mill Creek, WA | 20,750 | 77% | 60.4% |
| City | Population | Avg. Test Scores | National Avg. |
| North Salt Lake, UT | 20,721 | 41% | 15.2% |
| Mokena, IL | 20,720 | 45% | 5.7% |
| Lebanon, OH | 20,781 | 61% | 27.7% |
| Clifton, CO | 20,783 | 18% | 63.5% |
| Park Forest, IL | 20,715 | 26% | 46.0% |
| Mill Creek, WA | 20,750 | 77% | 60.4% |
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