Oakton is a census-designated place (CDP) in Fairfax County, Virginia, United States.

The CDP is bordered to the south by the city of Fairfax, to the west by Fair Oaks, to the northwest by Difficult Run, to the north by the Wolf Trap CDP, to the east by the town of Vienna, and to the southeast by Merrifield.

According to the United States Census Bureau, the CDP has a total area of 9.8 square miles (25.3 km2).

[3] At the 2020 census (some information from the 2022 American Community Survey) there were 36,732 people, 14,183 housing units and 14,071 households residing in the CDP.

The average housing unit density was 1,447.2 per square mile (558.4/km2).

[3] As of the census[1] of 2000, there were 29,348 people, 11,118 households, and 7,649 families residing in the CDP.

There were 11,392 housing units at an average density of 1,173.9 per square mile (453.2/km2).

21.7% of all households were made up of individuals, and 3.8% had someone living alone who was 65 years of age or older.