Chantilly is located in western Fairfax County in Northern Virginia. Recognized by the U.S. Census Bureau as a census-designated place (CDP), the community population was 23,039 as of the 2010 census – down from 41,041 in 2000, due to the splitting off of parts of it to form new CDPs including Greenbriar and Fair Lakes. It is named after an early 19th-century mansion and farm.
Chantilly is part of the Washington metropolitan area and is approximately 24 miles (39 km) from Washington, D.C.
According to a 2007 estimate, the median income for a household in the CDP was $105,838, and the median income for a family was $126,290. Males had a median income of $61,954 versus $41,608 for females. The per capita income for the CDP was $36,200. About 1.3% of families and 2.3% of the population were below the poverty line, including 1.7% of those under age 18 and 5.5% of those age 65 or over.
The area is seen by many as a “boom town” with more development planned for the future alongside ongoing construction throughout. Chantilly is home to many professionals including physicians that contract with the nearby airports and the government.