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, Suite 117
Fairfax, VA 22035 (please note that access to our office is by appointment only)
Michael Liddle
GIS Program Director

What We Do

GIS & Mapping Services is a division within Fairfax County's Department of Information Technology. It 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.

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Department News

GIS Day 2023

November 15, 2023
The 2023 GIS Excellence Gallery online interactive collection showcases the GIS-related work of Fairfax County employees and agencies over the last year.  Representatives from county agencies were on site at the Government Center on GIS Day 2023 to demonstrate and discuss the spatial tools and products that help them in their work, improve business processes, and engage and inform the public. Read more about GIS Day in Fairfax County  
ArtsFairfax Public Art Locator
July 17, 2023
ArtsFairfax, the nonprofit designated as the local arts agency for Fairfax County, has unveiled a new web application designed to identify and map public art in Fairfax County. Free and easy to use, the interactive app empowers County residents to share what they see as public art in their community. ArtsFairfax worked closely with the Fairfax County Department of Information Technology’s GIS & Mapping Services Division to develop the workflow and application’s user experience. Launch the ArtsFairfax Public Art Locator Read more about the application and public art in Fairfax County
Master Address Repository
April 17, 2023
Do you have a need to check if an address is valid in Fairfax County? Do you want to know how to officially format any Fairfax County address? The new Master Address Repository (MAR) application will let you do this and much more.   The new application is map based and allows for reporting and visualization of addresses in their physical location.  Search by street number, street name, city, ZIP Code, subdivision, parcel number, creation date, and expiration date.  Addresses can also be easily exported to file formats for use in Microsoft Office products.  Additionally, there is a street name search function to find valid street names in Fairfax County.  Launch the Master Address Repository


GIS Day is a global event during which GIS (Geographic Information Systems) users work to expand the understanding of how GIS technology and geography make a difference in our lives. GIS, a computer-based tool used to map and analyze features and events, combines the power of a database with the visualization capabilities offered by maps. Hundreds of thousands of people in the world use GIS to solve problems in areas such as environmental protection, pollution, health care, land use, asset deployment and routing, natural resources, conservation, business efficiency, education, and social inequities.

GIS Day provides an opportunity to recognize effective and creative use of spatial tools by Fairfax County staff to better serve agencies and constituents.

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