| City : | Weldon Spring City |
| County : | St. Charles County |
| State : | Missouri (MO) |
| | |
| Land Area : | 7.51 sq mi |
| Water Area : | 0.13 sq mi |
| Latitude : | 38.7093803 |
| Longitude : | -90.6525363 |
| | |
| Population (2010): | 5,443 |
| Population Estimate (2012) : | 5,473 |
| Population Density : | 725.11/sq mi |
| Housing Units (2012) : | 2,151 |
| Median Household Income (2012) : | $87,235 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $105,637 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $347,400 (Missouri : $138,400, USA : $181,400) |