Mapping & Geographic Information

Service Changes  (updated March 23, 2020)

  • Effective March 24, 2020, the office lobby at 1 Harrison Street, Leesburg will be closed to the public.
  • Services will continue to be provided during the Office’s normal operating hours, Monday - Friday, 8:00 a.m. - 4:30 p.m.
  • Call 703-771-5778 or email with questions or requests.
  • Address applications and checklists can be downloaded at loudoun.gov/omagi and submitted electronically to address@loudoun.gov, or mailed to:

Loudoun County Office of Mapping & Geographic Information
Attn: Address Coordinator
PO Box 7000
Leesburg, VA 20177

About the Office

The Loudoun County Office of Mapping and Geographic Information provides data, mapping, and analytical services to county agencies and the public and maintains the county’s Geographic Information System (GIS).

Loudoun County implemented GIS software in 1986, at the forefront of its popularity. The county’s GIS has received numerous awards over the years, most recently from Esri for 30 Years of Excellence in GIS (2016).