| Index | McMillin | Washington | National |
| Average Test Scores | n/a | 54% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 1,991 | 79,221 |
| Total private schools | n/a | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | McMillin | Washington | National |
| Completed 8th grade | 91.9% | 87.5% | 84.3% |
| Completed high school | 91.9% | 86.6% | 83.0% |
| Completed some college | 63.1% | 67.7% | 59.4% |
| Completed associate degree | 38.4% | 43.3% | 38.5% |
| Completed bachelors | 25.9% | 33.6% | 30.3% |
| Completed masters | 15.9% | 12.3% | 11.5% |
| Completed professional degree | 0.5% | 3.6% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in McMillin. Using the proficiency score averages, the average test scores for McMillin, WA schools is n/a. The average student to teacher ratio is n/a. In McMillin, WA, an average of 91.9% of students have completed 8th grade and an average of 91.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lake Tapps, WA | 12,129 | 78% | 62.8% |
| Carbonado, WA | 683 | 77% | 60.4% |
| Clear Lake, WA | 1,101 | 75% | 55.2% |
| University Place, WA | 33,661 | 72% | 49.1% |
| Bonney Lake, WA | 21,247 | 70% | 45.1% |
| McMillin, WA | 1,236 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ruckersville, VA | 1,236 | 72% | 50.0% |
| Frazeysburg, OH | 1,236 | 80% | 65.6% |
| Coleman, MI | 1,235 | 33% | 30.7% |
| Brilliant, AL | 1,235 | 47% | 2.1% |
| Osceola, MO | 1,235 | 36% | 26.0% |
| McMillin, WA | 1,236 | n/a |
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