District of Columbia
|Area|| 68.3 sq mi|
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the Residence Act approved the creation of a capital district as permitted by the U.S. Constitution. The District is under the exclusive jurisdiction of the United States Congress and is therefore not a part of any U.S. state. Washington, D.C., had an estimated population of 617,996 in 2011, the 25th most populous place in the United States. Commuters from the surrounding Maryland and Virginia suburbs raise the city's population to over one million during the workweek. The Washington Metropolitan Area, of which the District is a part, has a population of nearly 5.6 million, the seventh-largest metropolitan area in the country.
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