| Index | St. Ann | Missouri | National |
| Average Test Scores | 29% | 44% | 48% |
| Student/Teacher ratio | 13:1 | 14:1 | 16:1 |
| Total public schools | 6 | 1,899 | 79,221 |
| Total private schools | 2 | 531 | 24,874 |
| Total post-secondary schools | 2 | 213 | 7,963 |

| Index | St. Ann | Missouri | National |
| Completed 8th grade | 84.0% | 86.0% | 84.3% |
| Completed high school | 80.8% | 84.2% | 83.0% |
| Completed some college | 53.4% | 57.7% | 59.4% |
| Completed associate degree | 28.2% | 35.2% | 38.5% |
| Completed bachelors | 18.0% | 27.6% | 30.3% |
| Completed masters | 3.4% | 10.4% | 11.5% |
| Completed professional degree | 0.3% | 2.8% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 6 public schools, 2 private schools and 2 post-secondary schools in St. Ann. Using the proficiency score averages, the average test scores for St. Ann, MO schools is 29%. The average student to teacher ratio is 13:1. In St. Ann, MO, an average of 84.0% of students have completed 8th grade and an average of 80.8% 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% |
| Olivette, MO | 8,079 | 70% | 44.8% |
| Chesterfield, MO | 48,902 | 69% | 43.2% |
| Kirkwood, MO | 28,511 | 69% | 43.1% |
| St. Ann, MO | 13,143 | 29% | 40.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Key Biscayne, FL | 13,140 | 86% | 79.7% |
| Martinsville, VA | 13,146 | 77% | 60.9% |
| Clarkston, GA | 13,147 | 21% | 57.3% |
| Greenville, OH | 13,135 | 59% | 22.9% |
| Meadville, PA | 13,127 | 49% | 3.0% |
| St. Ann, MO | 13,143 | 29% | 40.6% |