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The Voice of the

Commonwealth's Counties

Fairfax County

County Courthouse
County Details

County Seat: Fairfax

Year Organized: 1742

Total Square Miles: 391

2020 Population: 1,150,309

Persons/Square Mile: 2942

County Structure

Government Type: County

Authority:  Dillon’s Rule

Legislative Body: Board of Supervisors

Size of Legislative Body: 10

County Links