| Zip Code : | 63366 |
| City : | Josephville village, Lake St. Louis city, O'Fallon city, St. Paul city, St. Peters city, Wentzville city |
| County : | St. Charles County |
| State : | Missouri (MO) |
| | |
| Land Area : | 68.75 sq mi |
| Water Area : | 1.33 sq mi |
| Latitude : | 38.8574426 |
| Longitude : | -90.7254925 |
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| Population (2010): | 46,175 |
| Population Estimate (2012) : | 47,464 |
| Population Density : | 671.63/sq mi |
| Housing Units (2012) : | 17,758 |
| Median Household Income (2012) : | $67,310 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $78,365 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $184,900 (Missouri : $138,400, USA : $181,400) |