Washington D.C
District of Columbia
Education
District of Columbia, federal district of the United States, coextensive
with the city of Washington, D.C., the national capital. It is situated
on the Potomac and Anacostia rivers and has an area of about 177 sq km
(about 68 sq mi).
Government departments and agencies are the major source of employment
in the District. Other important industries are tourism, including the
convention trade; scientific research and development; and the
manufacture of technical equipment. The District is well known for its
cultural institutions, historic landmarks, and parks.
Bills passed by the U.S. Congress in 1790-91 created the District on a
tract of land ceded by Maryland and Virginia. The area contained the
communities of Alexandria and Washington. The cornerstone of the U.S.
Capitol was laid in 1793, and in 1800 Congress moved here from its
temporary headquarters in Philadelphia. In 1847, Alexandria and the
remainder of the District on the western bank of the Potomac were
returned to the state of Virginia by an act of Congress. Georgetown held
the status of a separate town within the District from 1878 to 1895,
when it was merged with Washington. Population (1980) 638,432; (1990)
606,900.