| | Mehlville, MO | Affton, MO | United States |
| Expend. per Student | $13,953 | $13,953 | $15,905 |
| Educ. Expend. per Student | $11,967 | $11,967 | $13,142 |
| Instr. Expend. per Student | $6,927 | $6,927 | $7,999 |
| Pupil/Teacher Ratio | 14.01 | 14.01 | 16.23 |
| Students per Librarian | 632 | 632 | 4573 |
| Students per Counselor | 276 | 276 | 530 |
| Grade School Educ. | 2.8% | 1.8% | 4.8% |
| Some High School Educ. | 4.9% | 4.7% | 6.3% |
| High School Educ. | 92.2% | 93.4% | 88.9% |
| Some College Educ. | 23.0% | 22.4% | 20.0% |
| 2 yr College Grad. | 9.6% | 11.9% | 8.7% |
| 4 yr College Grad. | 29.1% | 32.8% | 33.7% |
| Masters Grad. | 8.0% | 9.3% | 9.3% |
| Professional Degree | 0.6% | 2.2% | 2.2% |
| Doctorate Degree | 1.0% | 0.6% | 1.5% |