| Zip Code : | 63303 |
| City : | St. Charles city, St. Peters city |
| County : | St. Charles County |
| State : | Missouri (MO) |
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| Land Area : | 19.85 sq mi |
| Water Area : | 1.54 sq mi |
| Latitude : | 38.7398818 |
| Longitude : | -90.5437442 |
| | |
| Population (2010): | 45,834 |
| Population Estimate (2012) : | 45,781 |
| Population Density : | 2,309.28/sq mi |
| Housing Units (2012) : | 19,851 |
| Median Household Income (2012) : | $67,103 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $82,240 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $197,800 (Missouri : $138,400, USA : $181,400) |