| Index | Clayton | Missouri | National |
| Average Test Scores | 73% | 44% | 48% |
| Student/Teacher ratio | 17:1 | 14:1 | 16:1 |
| Total public schools | 7 | 1,899 | 79,221 |
| Total private schools | 2 | 531 | 24,874 |
| Total post-secondary schools | n/a | 213 | 7,963 |
| Index | Clayton | Missouri | National |
| Completed 8th grade | 95.7% | 86.0% | 84.3% |
| Completed high school | 95.2% | 84.2% | 83.0% |
| Completed some college | 90.4% | 57.7% | 59.4% |
| Completed associate degree | 80.7% | 35.2% | 38.5% |
| Completed bachelors | 78.7% | 27.6% | 30.3% |
| Completed masters | 45.4% | 10.4% | 11.5% |
| Completed professional degree | 22.3% | 2.8% | 3.3% |
| Completed doctorate | 9.1% | 1.2% | 1.3% |
There are a total of 7 public schools, 2 private schools and n/a post-secondary schools in Clayton. Using the proficiency score averages, the average test scores for Clayton, MO schools is 73%. The average student to teacher ratio is 17:1. In Clayton, MO, an average of 95.7% of students have completed 8th grade and an average of 95.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| 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% |
| Webster Groves, MO | 22,906 | 64% | 32.8% |
| Clayton, MO | 16,763 | 73% | 52.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Defiance, OH | 16,741 | 70% | 46.3% |
| Knightdale, NC | 16,798 | 27% | 43.3% |
| Seagoville, TX | 16,726 | 54% | 11.5% |
| Danville, KY | 16,801 | 55% | 13.5% |
| Cohoes, NY | 16,708 | 52% | 8.5% |
| Clayton, MO | 16,763 | 73% | 52.7% |
Here are the best places to live in Missouri
Most Dangerous States In The US
These are the largest cities in Missouri
See the best places to live in Clayton