| Zip Code : | 63376 |
| City : | Cottleville city, O'Fallon city, St. Charles city, St. Peters city |
| County : | St. Charles County |
| State : | Missouri (MO) |
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| Land Area : | 41.54 sq mi |
| Water Area : | 0.02 sq mi |
| Latitude : | 38.7989045 |
| Longitude : | -90.6075399 |
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| Population (2010): | 70,828 |
| Population Estimate (2012) : | 71,241 |
| Population Density : | 1,705.13/sq mi |
| Housing Units (2012) : | 27,628 |
| Median Household Income (2012) : | $73,193 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $84,878 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $172,500 (Missouri : $138,400, USA : $181,400) |