St. Charles County, Missouri Facts
| Facts | |
| State | Missouri |
| Land area | 560.4 square miles |
| Population Density | 643.2 persons per square mile. |
| Population | |
| Population (2013) | 373,495 |
| Population change | 3.6% | Under 5 years of age | 6.2% |
| Under 18 | 24.7% |
| 65 and over | 12.8% |
| Females | 50.9% |
| White | 91 |
| Hispanic or Latino of any race | 3 |
| Asian | 2.4% |
| Two or more races | 1.8% |
| Black or African American | 4.6% |
| Native American | 0.3% |
| Pacific Islander | 0.1% |
| Had graduated from high school | 94% |
| Had a bachelor’s degree or higher | 35.1% |
| Veterans | 27,143 |
| Households and Housing | |
| Households | 135,974 |
| Persons per household | 2.6 |
| Living in the same house for one year or more | 89.1% |
| Median household income | $71,077 |
| The per capita income | $31,586 |
| Live below the poverty line. | 5.8% |
| housing units | 145,049 |
| Multi-unit structures | 16% |
| The median value of owner-occupied housing | $189,100 |
| Residents owning their homes. | 80.3% |
| Business Facts | |
| Total number of firms | 28,083 |
| Women-owned firms | 27.9% |
| Asian-owned firms | 2.1% |
| Hispanic-owned firms | 0.8% |
| Black-owned firms | 2% |
| Native American-owned firms | 0.2% |
| Pacific Islander-owned firms | 0% |
| Retail sales | $4,408,513 |
| Retail sales per capita | $12,822 |
| Manufacturers shipments | $6,532,751 |
| Merchant wholesaler sales | $9,325,599 |