The Loudoun County Treasurer's Office is responsible for the billing and collecting of taxes; issuing county vehicle license decals; and the investing, safeguarding, and disbursing of all county revenue. As a constitutional office, the department administers tax regulations in accordance with the Code of Virginia and the Codified Ordinances of Loudoun County.

The Treasurer's Office is dedicated to serving citizens, the commercial sector, the Board of Supervisors and other government agencies by disseminating personal and real property tax information in a professional and efficient manner.