United States

United States of America

Political Status: Independence declared on July 4, 1776; federal republic established under constitution adopted on March 4, 1789.

Area: 3,732,396 sq. mi. (9,666,532 sq. km); includes gross area (land and water) of the 50 states, excluding Puerto Rico and other territories. These totals are somewhat higher than earlier ones because of a 1990 change in the method of calculating interior waters.

Population: 327,859,492 (2012E—UN); 316,668,567 (2013E—U.S. Census). Does not include the U.S. Territories.

Major Urban Centers:

City Proper

Population (2012E)

Metro Area (2012E)

Washington, D.C.



New York, N.Y.



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