Loudoun County Address Data

  • State: Virginia
  • County: Loudoun County
  • County Seat: Leesburg
  • FIPS: 51107
  • Founded in: 1757
  • Population: 406,850
  • Density: 788 Persons/Square Mile
  • Area: 515 Square Miles
  • Government Type: County
  • Authority: Dillon's Rule
  • Legislative Body: Board of Supervisors
  • Legislative Body Size: 9
  • County Contact: P.O. Box 7000
    Leesburg, VA 20175-3102
  • County site: https://www.loudoun.gov/
  • Labor Force: 216,433
  • Unemployment Rate: 2.50%
  • Gross Domestic Product (GDP): $24.5 B

Top Cities in Loudoun County

Major Cities (population)

Neighbor Counties

  • Frederick County
  • Montgomery County
  • Washington County
  • Clarke County
  • Fairfax County
  • Fauquier County
  • Prince William County
  • Jefferson County
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