![](https://www.vaco.org/wp-content/uploads/2022/09/loudoun-county-seal.jpeg)
County Courthouse
![](https://www.vaco.org/wp-content/uploads/2022/09/Loudoun16.jpeg)
![](https://www.vaco.org/wp-content/uploads/2022/09/Loudoun16.jpeg)
County Details
County Seat: Leesburg
Year Organized: 1757
Total Square Miles: 516
2020 Population: 420,959
Persons/Square Mile: 816
County Structure
Government Type: County
Authority: Dillon’s Rule
Legislative Body: Board of Supervisors
Size of Legislative Body: 9