| City : | Ballwin City |
| County : | Butte County, Dubuque County, Roseau County, St. Louis County |
| State : | Missouri (MO) |
| | |
| Land Area : | 8.99 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 38.5950298 |
| Longitude : | -90.5500063 |
| | |
| Population (2010): | 30,404 |
| Population Estimate (2012) : | 30,446 |
| Population Density : | 3,381.80/sq mi |
| Housing Units (2012) : | 12,435 |
| Median Household Income (2012) : | $83,441 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $97,277 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $236,400 (Missouri : $138,400, USA : $181,400) |