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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. | 632,323 | 5,860,342 |
New York, N.Y. | 8,336,697 | 19,831,838 ... |