GIS Data

Data is the foundation of GIS, making it a valuable resource for governments, students, researchers and the private sector. Fairfax County GIS & Mapping Services provides access to many free GIS datasets on our Open Data page. We also have a topography dataset for purchase and resources for viewing our aerial photography collection. By accessing any of the data, maps, or applications provided by Fairfax County, you agree to the terms in our disclaimer.

GIS Open Data

Browse over 170 GIS data layers available for viewing/downloading. Search using keywords or browse by category.

Aerial Photography

View multiple years of aerial photography in our online viewer and find resources for downloading.

Topography Data

Topography data is available for purchase by county quadrant. Note that LiDAR data can be accessed using the USGS National Map link below.