Hybla Valley (/haɪblə/) is a census-designated place (CDP) in Fairfax County, Virginia, United States, south of Alexandria.

The population was 15,801 at the 2010 census,[3] down from 16,721 in 2000 due to a reduction in area, resulting from some of the eastward neighborhoods including much of Hollin Hills being moved to the Fort Hunt CDP.

The civilian airport was proposed to be the largest in the world, yet the land, which had once been dairy farm, was abandoned and is currently Huntley Meadows Park.

During World War II, the famous Hollin Hills subdivision, to the east of U.S. Route 1 towards the Potomac River, was completed by designers Charles Goodman and Robert Davenport.

Also during the war, the princess of Norway sought refuge from the conflict in Europe and wished to purchase the property of Hollin Hall; President Roosevelt personally inspected the land for her, yet his assistant, Thorpe, became its new owner in the end.

The west side of Hybla Valley has developed over the years, including construction of Mount Vernon Plaza in 2002.

In 1833, Gum Springs was founded by West Ford, a freed slave, skilled carpenter, and manager on George Washington's plantation, Mount Vernon.

Huntley Meadows Park is to the west within the Groveton CDP, and Little Hunting Creek separates Hybla Valley from Mount Vernon and Woodlawn.