Loudoun County GIS Open Data

The Loudoun County Office of Mapping and Geographic Information (OMAGI) is responsible for maintaining the core components of the County's Geographic Information System (GIS).

Download select GIS data for free through this open data portal.

Visit here to purchase additional data sets.  

Data Categories

Search and Download Data: Use the search bar above or click the icons below to explore available data. To download, select the data and view the available options. Use the Site Tour above to learn more.