GIS and Mapping Services

CONTACT INFORMATION: All public resources of the GIS Division are now available online. For public assistance, inquiries through email are responded to more rapidly than those via phone messages. County staff should utilize the internal Help Desk system for support.
703-324-2712 TTY 711
12000 Government Center Parkway
Fairfax, VA 22035
Michael Liddle
GIS Program Director

What We Do

The GIS Division of Fairfax County's Department of Information Technology is tasked with developing, maintaining, coordinating, and distributing GIS data and technology to Fairfax County government agencies and residents. The division also provides products and services for the public. A wide array of interactive mapping applications focus on a variety of Fairfax County data and services. Dozens of map layers, aerial imagery, and other data are available to view and download from the data page. The FAQ page has detailed information on many topics, including parcel information, finding maps, and basic GIS explanations. Go to the menu dropdown or Department Resources to find these links.

Other Popular Applications

An export from the Digital Map Viewer

 

 

The Digital Map Viewer is an online mapping application that provides users access to official Fairfax County map books, such as the Property and Zoning maps. The maps are in PDF format and are free to view, download, and print.

A screen capture of the Historical Imagery Viewer showing a building in two different years

 

The Historical Imagery Viewer is an online mapping application that provides access to Fairfax County’s aerial imagery collection dating back to 1937. Tools and widgets are provided in the app to navigate, swipe, measure, and export PDFs in letter (8.5 inches by 11 inches) and tabloid (11 inches by 17 inches) sizes.

A map, data table, and filters in the MAR pertaining to address informationThe Fairfax Master Address Repository (MAR) is the authoritative source for site addresses in Fairfax County. The Fairfax Master Address Repository Application is a web application which provides access to addresses and street names in the MAR. Web services and locators are also available for applications to retrieve or validate address information against the MAR.

Elected officials for the Fairfax County government center displayed from a click in a mapMy Neighborhood is an interactive mapping application that provides local information such as voting place, elected officials, assigned public schools, and other nearby public facilities, including police and fire stations. The application also includes links to other public web resources providing information about real estate tax assessments, land development, and zoning.

A search bar with an address typed in to validate if it is a county addressThe Validator is a simple but powerful application to verify the accuracy of addresses, street names, and parcel IDs for all real property in Fairfax County. While other mapping applications may be more flexible in returning results, The Validator connects directly to the county’s GIS database of actual, verified address, parcels and street names, so the results can be trusted to exist in real life.

A 3D visualization of Mount Vernon Estate using Fairfax County data

 

The Virtual Fairfax application combines a variety of 3D datasets into an immersive experience to view Fairfax County. Photo realistic buildings, Light Detection and Ranging (LiDAR) points, and generalized building mass models may be toggled on and off to view different 3D features and their relationships to each other.

Department News

The north atrium of the Government Center during the 2025 GIS Day Open House

November 19, 2025
Representatives and exhibits from ten county agencies were on site at the Government Center on GIS Day 2025 to demonstrate and discuss the spatial tools and products that help them in their work, improve business processes, and engage and inform the public. View a brief video recorded on Fairfax County GIS Day 2025 Open House.The 2025 GIS Excellence Gallery online interactive collection contains 28 entries highlighting innovative GIS projects from across the county.Read more about GIS Day in Fairfax County   
2025 aerial photography preview of Tysons
July 24, 2025
2025 aerial photography is now available across our GIS platform. The Historical Imagery Viewer contains the updated vertical aerial photography while Jade has both vertical and oblique photos. Additionally, Virtual Fairfax has been updated with 2025 3D aerial photography. 
Collage of LiDAR Products
April 1, 2025
Light Detection and Ranging (LiDAR) data collected in a partnership with the U.S. Geological Survey has been updated with our most recent 2022 capture. The data can be viewed in 3D in our Virtual Fairfax application or as a 2D surface in the LiDAR Elevation Viewer. GIS users who wish to download the raster data, rather than use our image services, should do so from the USGS National Map Viewer. More information can be found on our LiDAR Resources page.
Fairfax Virtual Assistant