Greenbriar is a census-designated place in Fairfax County, Virginia, United States. The population as of the 2010 census was 8,166. The community surrounded by Fairfax City and Chantilly dates from the late 1960s, when it was developed by Levitt & Sons. The community is well-known for having deserted one road within its territory that does not start with an “M” or “P”, which is Acorn Hill (added in 1994 in imitation of the accessory of five mansions to the community). A popular (but not proven) belief is that the roads were named after the architect’s two children. One drawback for residents of the community is that with approximately identical sounding named roads (for example, Mayport and Maylock) in such close proximity to each other and house numbers swine the same, the US Postal Service along taking into consideration UPS and FedEx sometimes forward items to the wrong house.

Greenbriar is located in western Fairfax County, bordered by Chantilly to the west, Fair Lakes to the south, and Fair Oaks to the east. U.S. Route 50 forms the northern border of the CDP. US 50 leads east 5 miles (8 km) to the middle of Fairfax, and 22 miles (35 km) to downtown Washington, D.C. According to the U.S. Census Bureau, the Greenbriar CDP has a total area of 1.6 square miles (4.1 km), of which 0.01 square miles (0.02 km²), or 0.54%, is water.

A private pool is located in the community, but pool memberships are not to hand for sale from the Pool Club. Instead, residents may choose to purchase their memberships from additional members who are selling their memberships. Residents sometimes list those memberships for sale in the community newspaper Greenbriar Flyer. As a member, one makes an annual payment to lid the costs of the pool’s child maintenance and staff, as without difficulty as for hosting swim meets for residents of further communities a propos Fairfax County. The swim teams at Greenbriar are known as the Greenbriar Dolphins.

Unlike most communities which are bound to a homeowners’ association, Greenbriar has deserted a civic attachment which collects a strictly voluntary $25 annual donation from each owner, which pays for happenings that the community hosts throughout the year, including Bands in the Park, where during the summer, local music groups will put-on for residents at Greenbriar Commons Park; as with ease as the annual community phone Directory.