| 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 | 17,205 | 73% | 52.7% |
| Brentwood, MO | 8,283 | 70% | 45.6% |
| Kirkwood, MO | 28,511 | 69% | 43.1% |
| Webster Groves, MO | 23,373 | 64% | 32.8% |
| Wildwood, MO | 36,455 | 63% | 30.2% |
| Byrnes Mill, MO | 3,054 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Portageville, MO | 3,058 | 42% | 12.2% |
| Nags Head, NC | 3,050 | 58% | 20.8% |
| Lake Delton, WI | 3,058 | 57% | 18.8% |
| Perkins, OK | 3,059 | 36% | 24.3% |
| Boutte, LA | 3,060 | 82% | 70.8% |
| Byrnes Mill, MO | 3,054 | n/a |