The Office of the County Administrator is the highest level management office of the Loudoun County government. The county administrator directs and supervises the day-to-day operations of all county departments and agencies, which are under the direct control of the Board of Supervisors pursuant to county ordinances and regulations.

The Office of the County Administrator also provides administrative support to the board and implements its directives with regard to board agendas, meetings, resolutions, and constituent services. Additionally, the county administrator serves as the Board of Supervisors' official liaison to the constitutional officers, the judiciary, and state and regional agencies.