The Pentagon

Headquarters of the United States Department of Defense; named after the shape of the building, a polygon with five (greek: penta) sides

The Pentagon is the headquarters of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the U.S. military, the phrase The Pentagon is often used as a metonym for the Department of Defense and its leadership.

Also known as...

Pentagon, Headquarters of the United States Department of Defense, Pentagon Office Building Complex, Headquarters of the United States Department of War (2025–present), Headquarters of the United States Department of Defense (1947–2025), and Headquarters of the United States Department of War (1789–1947)

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