| 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 | 12,497 | 78% | 62.8% |
| Carbonado, WA | 698 | 77% | 60.4% |
| Clear Lake, WA | 1,124 | 75% | 55.2% |
| University Place, WA | 34,663 | 72% | 49.1% |
| Bonney Lake, WA | 22,079 | 70% | 45.1% |
| McMillin, WA | 1,283 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Olmito, TX | 1,283 | 63% | 30.2% |
| Kettleman City, CA | 1,283 | 32% | 33.3% |
| Orangeville, UT | 1,283 | 42% | 12.5% |
| Onsted, MI | 1,283 | 40% | 16.7% |
| Belle, MO | 1,283 | 50% | 3.6% |
| McMillin, WA | 1,283 | n/a |