| Name | Loudoun County |
| State | Virginia |
| FIPS Code | 51107 |
| County Seat | Leesburg |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 437,164 |
| Population Growth Rate(2020-2024) | 3.71% |
| Majority Ethnicity | White 56.14% |
| Public School Majority Ethnicity | White 42% |
| Partisan Voting Index | Democratic:+9 |
| Unemployment Rate (May 2026) | 3.8% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 571 / 703 / 540 / 826 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 56.14% |
| African American | 7.81% |
| Hispanic | 14.36% |
| Asian | 21.33% |
| Native American | 0.3% |
| Hawaiin/Pacific Islander | 0.06% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 41.53% |
| African American | 7.23% |
| Hispanic | 19.12% |
| Asian | 25.42% |
| Native American | 0.65% |
| Hawaiin/Pacific Islander | 0.13% |