The United States of America - also referred as the United States, the U.S., the USA, or America, is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to the east and Russia to the west across the Bering Strait. The state of Hawaii is an archipelago in the mid-Pacific. The country also possesses several territories in the Caribbean and Pacific.
Capital Washington, D.C.
38°53′N 77°01′W / 38.883°N 77.017°W / 38.883; -77.017 Largest city New York City Official languages None at federal level1 National language English 2 Demonym American Government Federal constitutional republic - President Barack Obama - Vice President Joe Biden - Speaker of the House Nancy Pelosi - Chief Justice John Roberts Independence from the Kingdom of Great Britain - Declared July 4, 1776 - Recognized September 3, 1783 - Current constitution June 21, 1788 Area - Total 9,826,675 km2 (3rd/4th3)
3,794,101 sq mi - Water (%) 6.76 Population - 2010 estimate 308,347,000 (3rd4) - 2000 census 281,421,906 - Density 32/km2 (178th)
83/sq mi GDP (PPP) 2008 estimate - Total $14.441 trillion (1st) - Per capita $47,440 (6th) GDP (nominal) 2008 estimate - Total $14.441 trillion (1st) - Per capita $47,440 (17th) Gini (2007) 45.0 (44th) HDI (2007) ▲ 0.956[5] (very high) (13th) Currency United States dollar ($) (USD) Time zone (UTC-5 to -10) - Summer (DST) (UTC-4 to -10) Date formats m/d/yy (AD) Drives on the right Internet TLD .us .gov .mil .edu Calling code +1
Map of The United States of America
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Alabama Hawaii Massachusetts New Mexico South Dakota
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Delaware Louisiana Nevada Pennsylvania West Virginia
Florida Maine New Hampshire Rhode Island Wisconsin
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