Fairfax County Research Aids
While the Fairfax Genealogy Society is not able to conduct research for you, we recommend the following websites and repositories for research on Fairfax County ancestors:
The Research Wiki page for Fairfax County on FamilySearch.org is an excellent starting point for background on the County’s history and for records available pertaining to the County.
The Fairfax County Public Library's Virginia Room is the primary repository for materials on Fairfax County.  Its website states that the Virginia Room “maintains a collection rich in regional history and genealogy, as well as local and state government information and legal resources. Staff collect the historical record of the people, associations, events and places of Fairfax County, Virginia. In addition to our local history resources, researchers can use our print holdings and online databases to research genealogy from all 50 states. Other resources available for use are: maps, an extensive photographic archive, manuscript collections, local newspapers, and rare books.”  The Virginia Room is located at the City of Fairfax Regional Library, 10360 North Street Fairfax, VA 22030-2514. Phone: (703) 293-6383 E-mail: va_room@fairfaxcounty.gov
Please check the Virginia Room link for their current hours and to see a list of online resources that they have available.
The Fairfax Circuit Court Historic Records Center holds records of the county and circuit courts dating from the formation of Fairfax County in 1742 up through the early 1900s.  Among its collections are the wills of George and Martha Washington.  The Historic Records Center is a working archive and is open to the public. 
Based in Alexandria, this Society offers many useful programs and maintains its own research library which is open to the public.
The Fairfax County Cemetery Preservation Association, Inc. web site is a place for learning about and helping preserve and protect Fairfax County, Virginia’s endangered cemeteries. Check back often to learn about current projects, what volunteers are doing and how you can help.
The Fairfax County History Commission was established by the County of Fairfax in 1969 to help identify, document, record, and preserve the county's historic past in Northern Virginia. The commission's 20 members are appointed by the Fairfax County Board of Supervisors, and meets on the first Wednesday of every month. Its accomplishments and projects in progress are detailed in an Annual Report submitted to the Board of Supervisors.
Fairfax County Cemeteries
In the 1980’s, members of the Fairfax Genealogical Society transcribed the gravestones at more than 350 burial sites in Fairfax County.  The results were published in a 6-volume set in the 1990’s.  To see more information about this effort and to view digital copies of these books, follow this link to Fairfax County Gravestone Books.
Click here for a list of Fairfax County Cemeteries.