| Index | Byrnes Mill | Missouri | National |
| Average Test Scores | n/a | 44% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 1,899 | 79,221 |
| Total private schools | n/a | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | Byrnes Mill | Missouri | National |
| Completed 8th grade | 85.3% | 86.0% | 84.3% |
| Completed high school | 83.5% | 84.2% | 83.0% |
| Completed some college | 53.3% | 57.7% | 59.4% |
| Completed associate degree | 33.7% | 35.2% | 38.5% |
| Completed bachelors | 22.2% | 27.6% | 30.3% |
| Completed masters | 5.0% | 10.4% | 11.5% |
| Completed professional degree | 0.7% | 2.8% | 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 Byrnes Mill. Using the proficiency score averages, the average test scores for Byrnes Mill, MO schools is n/a. The average student to teacher ratio is n/a. In Byrnes Mill, MO, an average of 85.3% of students have completed 8th grade and an average of 83.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clayton, MO | 16,763 | 73% | 52.7% |
| Brentwood, MO | 7,986 | 70% | 45.6% |
| Kirkwood, MO | 27,772 | 69% | 43.1% |
| Webster Groves, MO | 22,906 | 64% | 32.8% |
| Wildwood, MO | 35,476 | 63% | 30.2% |
| Byrnes Mill, MO | 2,983 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Versailles, MO | 2,983 | 43% | 10.4% |
| Tularosa, NM | 2,983 | 24% | 49.3% |
| Nocona, TX | 2,982 | 50% | 3.5% |
| Pine Ridge, SD | 2,984 | 4% | 92.7% |
| De Leon Springs, FL | 2,982 | 45% | 7.3% |
| Byrnes Mill, MO | 2,983 | n/a |
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