Fairfax Station is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population was 12,030 at the 2010 census. Located in Northern Virginia, its center is located 22 miles (35 km) southwest of Washington, D.C.
Fairfax Station is located in western Fairfax County, between Clifton to the west, Burke to the east, and the city of Fairfax to the north. The original community of Fairfax Station is located in the eastern part of the CDP, where State Route 123 (Ox Road) crosses the Norfolk Southern Railway line. State Route 286, the Fairfax County Parkway, curves through the center of the CDP, leading northwest to Fair Lakes and southeast to Newington.
Population densities range from 200 to 500 per square mile (77 to 193 per square kilometer) in the northern, southern, and western portions of the CDP, to between 1,600 and 2,200 per square mile (584 to 849 per square kilometer) in the center and eastern portions.
According to the U.S. Census Bureau, the Fairfax Station CDP has a total area of 9.2 square miles (23.8 km2), of which 9.1 square miles (23.6 km2) is land and 0.1 square miles (0.2 km2), or 0.85%, is water.
As of the census of 2010, there were 12,030 people, 4,070 households, and 3,497 families residing in the CDP. The population density was 1,323.4 people per square mile (510.8/km²). There were 4,140 housing units at an average density of 455.4/sq mi (175.8/km²). The racial makeup of the CDP was 78.9% White, 3.9% African American, 0.1% Native American, 12.2% Asian, 0.04% Pacific Islander, 1.7% some other race, and 3.2% from two or more races. Hispanic or Latino of any race were 7.2% of the population.
There were 4,070 households, out of which 38.7% had children under the age of 18 living with them, 77.6% were headed by married couples living together, 5.9% had a female householder with no husband present, and 14.1% were non-families.