| Index | Mehlville | Missouri | National |
| Average Test Scores | 46% | 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 | Mehlville | Missouri | National |
| Completed 8th grade | 87.7% | 86.0% | 84.3% |
| Completed high school | 86.0% | 84.2% | 83.0% |
| Completed some college | 60.5% | 57.7% | 59.4% |
| Completed associate degree | 37.0% | 35.2% | 38.5% |
| Completed bachelors | 28.6% | 27.6% | 30.3% |
| Completed masters | 9.1% | 10.4% | 11.5% |
| Completed professional degree | 1.7% | 2.8% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Mehlville. Using the proficiency score averages, the average test scores for Mehlville, MO schools is 46%. The average student to teacher ratio is n/a. In Mehlville, MO, an average of 87.7% of students have completed 8th grade and an average of 86.0% 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% |
| Mehlville, MO | 28,824 | 46% | 4.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Paragould, AR | 28,821 | 46% | 3.3% |
| Bella Vista, AR | 28,819 | 77% | 59.4% |
| Wellesley, MA | 28,747 | 80% | 66.0% |
| Ridgecrest, CA | 28,905 | 42% | 12.9% |
| Port Huron, MI | 28,918 | 29% | 39.0% |
| Mehlville, MO | 28,824 | 46% | 4.7% |
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