| Index | Affton | Missouri | National |
| Average Test Scores | 50% | 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 | Affton | Missouri | National |
| Completed 8th grade | 88.9% | 86.0% | 84.3% |
| Completed high school | 87.3% | 84.2% | 83.0% |
| Completed some college | 66.3% | 57.7% | 59.4% |
| Completed associate degree | 43.4% | 35.2% | 38.5% |
| Completed bachelors | 34.1% | 27.6% | 30.3% |
| Completed masters | 12.7% | 10.4% | 11.5% |
| Completed professional degree | 3.1% | 2.8% | 3.3% |
| Completed doctorate | 0.6% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Affton. Using the proficiency score averages, the average test scores for Affton, MO schools is 50%. The average student to teacher ratio is n/a. In Affton, MO, an average of 88.9% of students have completed 8th grade and an average of 87.3% 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% |
| Olivette, MO | 7,837 | 70% | 44.8% |
| Chesterfield, MO | 47,603 | 69% | 43.2% |
| Kirkwood, MO | 27,772 | 69% | 43.1% |
| Affton, MO | 19,580 | 50% | 4.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Monroe, MI | 19,543 | 39% | 18.9% |
| El Reno, OK | 19,539 | 34% | 30.1% |
| Bourbonnais, IL | 19,639 | 31% | 35.2% |
| Montgomery, IL | 19,515 | 26% | 45.4% |
| Oroville, CA | 19,659 | 34% | 29.3% |
| Affton, MO | 19,580 | 50% | 4.7% |
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