| Zip Code : | 63341 |
| City : | Defiance, New Melle city, O'Fallon city |
| County : | St. Charles County |
| State : | Missouri (MO) |
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| Land Area : | 54.76 sq mi |
| Water Area : | 1.36 sq mi |
| Latitude : | 38.6708250 |
| Longitude : | -90.8158880 |
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| Population (2010): | 3,530 |
| Population Estimate (2012) : | 3,712 |
| Population Density : | 64.47/sq mi |
| Housing Units (2012) : | 1,403 |
| Median Household Income (2012) : | $89,648 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $98,250 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $347,400 (Missouri : $138,400, USA : $181,400) |