 mount vernon is a census-designated place (cdp) in fairfax county, virginia, united states. nearby cdps are fort belvoir (west), groveton, virginia and hybla valley, virginia (north), and fort hunt, virginia (east). the population was 12,416 at the 2010 census. while "mount vernon"âdrawn from the mount vernon plantation, the home of george washington located south of alexandriaâis often used locally to refer to the entire unincorporated area between old town alexandria and fort belvoir, mount vernon as defined by the census bureau encompasses only the part of it coextensive with alexandria zip code 22309, bounded by the potomac river to the south, fort belvoir to the west, huntley meadows park to the north, and little hunting creek to the east. ==geography== mount vernon is located at  (38.725214, -77.107349) according to the united states census bureau, the cdp has a total area of 8.4&nbsp;square miles
Census-designated_places_in_Fairfax_County,_Virginia Census-designated_places_in_Virginia South_Alexandria,_Virginia Unincorporated_communities_in_Virginia Virginia_populated_places_on_the_Potomac_River Washington_metropolitan_area