| Name | Loudoun County |
| State | Virginia |
| FIPS Code | 51107 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2020) | 420,959 |
| Population Growth Rate(2000-2020) | 34.79% |
| Majority Ethnicity | White 62.72% |
| Public School Majority Ethnicity | White 49% |
| Partisan Voting Index | Democratic:+12 |
| Unemployment Rate | 2.3% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 62.72% |
| African American | 7.07% |
| Hispanic | 12.83% |
| Asian | 17.04% |
| Native American | 0.25% |
| Hawaiin/Pacific Islander | 0.09% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 48.88% |
| African American | 6.74% |
| Hispanic | 17.16% |
| Asian | 21.22% |
| Native American | 0.51% |
| Hawaiin/Pacific Islander | 0.11% |