Washington, D.C. is the capital city of the United States of America. "D.C." is an abbreviation for the District of Columbia, the federal district coextensive with the city of Washington. The city is named after George Washington, military leader of the American Revolution and the first President of the United States.
According to the
Census Bureau, the District's daytime population is estimated at 982,853.
[9] The influx of over 410,000 workers into Washington on a normal business day comprises a 72% increase of the capital's normal population. That is the largest increase percentage-wise of any city studied and the second-largest net increase, behind only
New York City.
District of Columbia QuickFacts from the US Census Bureau