The Mount Vernon area is all land which was once a part of the farms of George and Martha Washington's expansive Mount Vernon Estate. Much of the land was gradually donated through the dying wishes of George and Martha Washington to the public and others who are affiliated with the Washington family. The Neighboring/incorporated Woodlawn Plantation and area which was given to Washington's grand-daughter, Eleanor Parke Custis Lewis. The Gum Springs portion was established by slaves and blacks which were generally escaped or freed slaves from the Mount Vernon Estate and area. Beginning with the 2010 United States Census, the U.S. Census Bureau defined the portion of Mount Vernon north of U.S. Route 1 as a separate CDP, Woodlawn, reducing Mount Vernon's land area by approximately a third and its population by more than half.
Geography
Mount Vernon is located at at an elevation of. Located on U.S. Route 1 in Northern Virginia, Mount Vernon is south-southwest of downtown Washington, D.C. and southeast of Fairfax, the county seat. Mount Vernon sits on the Atlantic Coastal Plain on the north side of the Potomac River. Two small tributaries of the river flow south through the CDP: Dogue Creek runs through the western part of the CDP, and Little Hunting Creek forms the CDP's eastern border. According to the United States Census Bureau, the CDP has a total area of of which is land and is water. As a suburb of Washington, D.C., Mount Vernon is a part of both the Washington Metropolitan Area and the larger Baltimore-Washington Metropolitan Area. It borders other Washington suburbs on all sides, including: Woodlawn and Hybla Valley to the north, Fort Hunt to the east, Accokeek and Bryans Road, Maryland across the Potomac River to the southeast, and Fort Belvoir to the west.
Demographics
As of the census of 2000, there were 28,582 people, 10,575 households, and 7,487 families residing in the CDP. The population density was 1,450.1/km2. There were 10,926 housing units at an average density of 1,435.7/sq mi. The racial makeup of the CDP was 54.42% White, 27.65% African American, 0.33% Native American, 6.33% Asian, 0.13% Pacific Islander, 6.87% from other races, and 4.26% from two or more races. Hispanic or Latino of any race were 14.50% of the population. There were 10,575 households out of which 34.4% had children under the age of 18 living with them, 51.0% were married couples living together, 15.0% had a female householder with no husband present, and 29.2% were non-families. 22.6% of all households were made up of individuals and 4.4% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.16. In the CDP, the population was spread out with 26.3% under the age of 18, 7.9% from 18 to 24, 32.4% from 25 to 44, 24.4% from 45 to 64, and 9.0% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 94.3 males. For every 100 females age 18 and over, there were 90.8 males. The median income for a household in the CDP was $61,119, and the median income for a family was $67,892. Males had a median income of $42,049 versus $33,543 for females. The per capita income for the CDP was $29,299. About 5.3% of families and 7.0% of the population were below the poverty line, including 9.7% of those under age 18 and 2.4% of those age 65 or over.
