![](https://www.vaco.org/wp-content/uploads/Arlington-county-seal.jpg)
![](https://www.vaco.org/wp-content/uploads/Arlington-county-seal.jpg)
County Courthouse
![](https://www.vaco.org/wp-content/uploads/2022/09/Arlington16.png)
County Details
County Seat: Arlington
Year Organized: 1801
Total Square Miles: 26
2020 Population: 238,643
Persons/Square Mile: 9,180
County Structure
Government Type: County
Authority: Dillon’s Rule
Legislative Body: Board of Supervisors
Size of Legislative Body: 5