Loudoun County, Virginia Facts
| Facts | |
| State | Virginia |
| Land area | 515.6 square miles |
| Population Density | 605.8 persons per square mile. |
| Population | |
| Population (2013) | 349,679 |
| Population change | 12% | Under 5 years of age | 7.9% |
| Under 18 | 29.8% |
| 65 and over | 7.6% |
| Females | 50.4% |
| White | 71.7 |
| Hispanic or Latino of any race | 13.1 |
| Asian | 16.5% |
| Two or more races | 3.5% |
| Black or African American | 7.7% |
| Native American | 0.5% |
| Pacific Islander | 0.1% |
| Had graduated from high school | 94% |
| Had a bachelor’s degree or higher | 57.9% |
| Veterans | 20,436 |
| Households and Housing | |
| Households | 106,997 |
| Persons per household | 3.0 |
| Living in the same house for one year or more | 87.9% |
| Median household income | $122,238 |
| The per capita income | $46,565 |
| Live below the poverty line. | 3.6% |
| housing units | 118,341 |
| Multi-unit structures | 16% |
| The median value of owner-occupied housing | $437,700 |
| Residents owning their homes. | 77.7% |
| Business Facts | |
| Total number of firms | 28,697 |
| Women-owned firms | 31.7% |
| Asian-owned firms | 13% |
| Hispanic-owned firms | 6.9% |
| Black-owned firms | 5% |
| Native American-owned firms | 0.6% |
| Pacific Islander-owned firms | 0.1% |
| Retail sales | $4,469,513 |
| Retail sales per capita | $16,109 |
| Manufacturers shipments | $1,400,175 |
| Merchant wholesaler sales | $1,491,999 |