Mapping & Geographic Information

Service Changes  (Updated June 14, 2021)

  • Visitors must check in with the information desk in the first floor lobby. Customers are encouraged to call 703-771-5778 to make an appointment.
  • Services will continue to be provided during the Office’s normal operating hours, Monday - Friday, 8:30 a.m. - 5:00 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 through email 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).