| Index | Lake St. Louis | Missouri | National |
| Average Test Scores | 71% | 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 | Lake St. Louis | Missouri | National |
| Completed 8th grade | 94.7% | 86.0% | 84.3% |
| Completed high school | 94.7% | 84.2% | 83.0% |
| Completed some college | 75.2% | 57.7% | 59.4% |
| Completed associate degree | 50.3% | 35.2% | 38.5% |
| Completed bachelors | 40.2% | 27.6% | 30.3% |
| Completed masters | 14.6% | 10.4% | 11.5% |
| Completed professional degree | 2.4% | 2.8% | 3.3% |
| Completed doctorate | 1.5% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Lake St. Louis. Using the proficiency score averages, the average test scores for Lake St. Louis, MO schools is 71%. The average student to teacher ratio is n/a. In Lake St. Louis, MO, an average of 94.7% of students have completed 8th grade and an average of 94.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Dardenne Prairie, MO | 13,385 | 73% | 51.0% |
| Weldon Spring, MO | 5,536 | 70% | 45.5% |
| Chesterfield, MO | 47,603 | 69% | 43.2% |
| Cottleville, MO | 5,439 | 69% | 43.1% |
| St. Peters, MO | 57,536 | 63% | 31.5% |
| Lake St. Louis, MO | 16,357 | 71% | 48.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Heber, UT | 16,362 | 43% | 10.9% |
| Adelphi, MD | 16,364 | 19% | 59.6% |
| Red Wing, MN | 16,366 | 49% | 2.6% |
| Cañon City, CO | 16,369 | 34% | 29.3% |
| Dyersburg, TN | 16,371 | 50% | 3.6% |
| Lake St. Louis, MO | 16,357 | 71% | 48.4% |
Here are the best places to live in Missouri
Check out the 10 safest cities in Missouri
Check out the 10 most dangerous cities in Missouri
Most Dangerous States In The US