| Name | Arlington County |
| State | Virginia |
| FIPS Code | 51013 |
| County Seat | Arlington |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 235,181 |
| Population Growth Rate(2020-2024) | -1.47% |
| Majority Ethnicity | White 63.36% |
| Public School Majority Ethnicity | White 43% |
| Partisan Voting Index | Strongly Democratic:+30 |
| Unemployment Rate (May 2026) | 3.2% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 571 / 703 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 63.36% |
| African American | 9.54% |
| Hispanic | 15.92% |
| Asian | 10.62% |
| Native American | 0.53% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 42.65% |
| African American | 10.61% |
| Hispanic | 29.74% |
| Asian | 8.78% |
| Native American | 0.17% |
| Hawaiin/Pacific Islander | 0.04% |