United States

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Complete guide: North America

Updated: October 17, 2026

🇺🇸 United States

Capital: Washington, D.C.

Washington, D.C., capital of the United StatesWashington, D.C. – The national capital and seat of the United States federal government.

Washington, D.C. is the capital of the United States and the seat of its federal government. The permanent federal capital was authorized in 1790, the city was planned beginning in 1791, and the federal government moved from Philadelphia to Washington in 1800. Today, the District of Columbia contains the White House, United States Capitol, Supreme Court, federal departments and agencies, major museums, monuments, universities, diplomatic missions, and residential neighborhoods.

📜 Timeline of Washington, D.C.

1790: The Residence Act established a permanent seat of the federal government along the Potomac River and authorized President George Washington to select the location.

1791: Pierre Charles L’Enfant developed the original plan for the new federal city, with major avenues and government sites organized around the Capitol and President’s House.

1800: The federal government relocated from Philadelphia to Washington. Congress met in the still-unfinished U.S. Capitol for the first time on November 17.

1863: The final section of the Statue of Freedom was installed on top of the Capitol dome on December 2.

1866: Construction of the Capitol’s cast-iron dome, begun in 1856, was completed. The Capitol extensions were completed later, in 1868.

Today: Washington, D.C. remains the national capital and the principal location of the executive, legislative, and judicial branches of the federal government.

📊 Quick Stats

Federal Capital Established

1790

The Residence Act authorized a permanent federal capital; planning of Washington began in 1791.

Language

English

Currency

United States Dollar (USD)

Geography

Located along the Potomac and Anacostia rivers between Maryland and Virginia

Time Zone

Eastern Time (ET)

EST (UTC−5) in standard time and EDT (UTC−4) during daylight saving time.

Calling Code

+1

Driving Side

Right-hand traffic

🏛️ Iconic Landmarks

Lincoln Memorial

A national memorial honoring Abraham Lincoln, the 16th President of the United States, and the site of major events in the history of the U.S. civil rights movement.

United States Capitol

The meeting place of the U.S. Congress. Congress first met in the building in 1800, while later construction added the House and Senate extensions and the present cast-iron dome.

Washington Monument

An obelisk honoring George Washington, the first President of the United States. Its observation level provides views across the National Mall and central Washington.

Did you know? Congress began meeting in the U.S. Capitol in 1800, decades before the present cast-iron dome was completed in 1866.

Washington, D.C. remains the political center of the United States, housing the federal government alongside national museums, monuments, diplomatic missions, universities, and residential communities.

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