| Name | Fairfax County |
| State | Virginia |
| FIPS Code | 51059 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 1,146,677 |
| Population Growth Rate(2020-2024) | -0.32% |
| Majority Ethnicity | White 51.84% |
| Public School Majority Ethnicity | White 37% |
| Partisan Voting Index | Democratic:+18 |
| Unemployment Rate (May 2026) | 3.7% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 571 / 703 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 51.84% |
| African American | 9.91% |
| Hispanic | 17.57% |
| Asian | 20.14% |
| Native American | 0.5% |
| Hawaiin/Pacific Islander | 0.05% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 36.7% |
| African American | 9.76% |
| Hispanic | 27.78% |
| Asian | 19.09% |
| Native American | 0.28% |
| Hawaiin/Pacific Islander | 0.11% |