| Zip Code : | 63385 |
| City : | Flint Hill city, Foristell city, Josephville village, Lake St. Louis city, New Melle city, O'Fallon city, Wentzville city |
| County : | St. Charles County |
| State : | Missouri (MO) |
| | |
| Land Area : | 67.03 sq mi |
| Water Area : | 0.12 sq mi |
| Latitude : | 38.7969934 |
| Longitude : | -90.8572608 |
| | |
| Population (2010): | 35,750 |
| Population Estimate (2012) : | 33,903 |
| Population Density : | 533.37/sq mi |
| Housing Units (2012) : | 12,777 |
| Median Household Income (2012) : | $73,590 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $82,474 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $214,100 (Missouri : $138,400, USA : $181,400) |