| Index | Greendale | Missouri | National |
| Average Test Scores | n/a | 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 | Greendale | Missouri | National |
| Completed 8th grade | 92.5% | 86.0% | 84.3% |
| Completed high school | 92.5% | 84.2% | 83.0% |
| Completed some college | 73.3% | 57.7% | 59.4% |
| Completed associate degree | 46.2% | 35.2% | 38.5% |
| Completed bachelors | 39.1% | 27.6% | 30.3% |
| Completed masters | 13.5% | 10.4% | 11.5% |
| Completed professional degree | 3.4% | 2.8% | 3.3% |
| Completed doctorate | 1.7% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Greendale. Using the proficiency score averages, the average test scores for Greendale, MO schools is n/a. The average student to teacher ratio is n/a. In Greendale, MO, an average of 92.5% of students have completed 8th grade and an average of 92.5% 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% |
| Greendale, MO | 877 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Robbinsville, NC | 877 | 38% | 20.5% |
| Coalmont, TN | 877 | 21% | 56.8% |
| Sedan, KS | 876 | 25% | 49.0% |
| Beatty, NV | 876 | 35% | 27.1% |
| Richardton, ND | 876 | 32% | 33.3% |
| Greendale, MO | 877 | n/a |