Mason Neck, Virginia

Mason Neck, Virginia
Mason Neck
Location of Mason Neck in Fairfax County, Virginia
Mason Neck
Mason Neck (Virginia)
Mason Neck
Mason Neck (the United States)
Coordinates: 38°39′23″N 77°10′45″W / 38.65639°N 77.17917°W / 38.65639; -77.17917
CountryUnited States
StateVirginia
CountyFairfax
Area
 • Total
20.0 sq mi (51.9 km2)
 • Land13.9 sq mi (35.9 km2)
 • Water6.2 sq mi (16.0 km2)
Elevation
20 ft (6.1 m)
Population
 (2010)
 • Total
2,005
 • Density145/sq mi (55.9/km2)
Time zoneUTC−5 (Eastern (EST))
 • Summer (DST)UTC−4 (EDT)
FIPS code51-49998
GNIS feature ID2584877

Mason Neck is a peninsula jutting into the Potomac River in Fairfax County, Virginia, United States, southwest of Washington, D.C. It is surrounded by Belmont Bay to the west, the Potomac River to the south and east, Gunston Cove to the northeast, and Pohick Bay to the north-northeast. Mason Neck forms the southernmost section of Fairfax County in Northern Virginia. It comprises an area of 20.0 square miles (51.8 km2), two-thirds of which is preserved as parkland by regional, state, and national authorities. As of the 2020 census, Mason Neck had a population of 2,025.