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The Voice of the

Commonwealth's Counties

Prince William County

County Courthouse
County Details

County Seat: Manassas

Year Organized: 1731

Total Square Miles: 335

2020 Population: 482,204

Persons/Square Mile: 1,438

County Structure

Government Type: County

Authority:  Dillon’s Rule

Legislative Body: Board of Supervisors

Size of Legislative Body: 8

County Links