| Place Name | Lake Saint Louis |
| Place Type | Unincorporated |
| ZIP Code(s) | 63367 |
| County | Saint Charles County |
| Area Code(s) | 636 |
| Timezone | Central Daylight Time (CDT) |
| Population () | |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Missouri 3rd |
| State House Districts | 108 |
| State Senate Districts | 2 |