Washington, D.C., formally the District of Columbia and commonly called Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with Maryland to its north and east. Washington, D.C., was named for George Washington, a Founding Father and the first president of the United States. The district is named for Columbia, the female personification of the nation. Washington, D.C., anchors the southern end of the Northeast megalopolis, one of the nation's largest and most influential cultural, political, and economic regions. As the seat of the U.S. federal government and several international organizations, the city is an important world political capital. The city had 20.7 million domestic visitors and 1.2 million international visitors, ranking seventh among U.S. cities as of 2022.

Country: United States
Residence Act: July 16, 1790
Organized: February 27, 1801
Consolidated: February 21, 1871
Home Rule Act: December 24, 1973
Named for: George Washington, Columbia
Type: Mayor–council
Mayor: Muriel Bowser (D)
U.S. House: Eleanor Holmes Norton (D), Delegate (At-large)
Population (2020): 689,545
Estimate (2023): 678,972
Rank: 64th in North America, 23rd in the United States
Urban: 5,174,759 (US: 8th)
Metro: 6,304,975 (US: 7th)
Demonym(s): Washingtonian
Time zone: EST (UTC−5)
Summer (DST): EDT (UTC−4)
ZIP Codes: 20001–20098, 20201–20599, 56901–56999
Area code(s): 202 and 771
ISO 3166 code: US-DC
Wikidata description: capital city of the United States of America
Wikidata id: Q61
Wikidata label: Washington, D.C.
Wikidata aliases: Array
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