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Index WorldCountry page : United StatesPage in french
  Flag : United StatesUnited StatesPopulation Population
Government Government
Economy Economy
Geography Geography
Communication Communication
Transportation Transportation


United States - North America



Population  PopulationTop of page
InhabitantsLife expectancy
301,139,947 (July 2007 est.)total population: 78 years
male: 75.15 years
female: 80.97 years (2007 est.)
Ethnic groupsReligions
white 81.7%, black 12.9%, Asian 4.2%, Amerindian and Alaska native 1%, native Hawaiian and other Pacific islander 0.2% (2003 est.)
Protestant 52%, Roman Catholic 24%, Mormon 2%, Jewish 1%, Muslim 1%, other 10%, none 10% (2002 est.)
LanguagesLiteracy
English 82.1%, Spanish 10.7%, other Indo-European 3.8%, Asian and Pacific island 2.7%, other 0.7% (2000 census)
definition: age 15 and over can read and write
total population: 99%
male: 99%
female: 99% (2003 est.)


Government  GovernmentTop of page
Government typeCapital
Constitution-based federal republic; strong democratic tradition Washington, DC
IndependanceNational day
4 July 1776 (from Great Britain)Independence Day, 4 July (1776)
ConstitutionLegal system
17 September 1787, effective 4 March 1789federal court system based on English common law; each state has its own unique legal system, of which all but one (Louisiana's) is based on English common law; judicial review of legislative acts


Economy  EconomyTop of page
GDP (purchasing power parity)Growth rate
$13.22 trillion (2006 est.)3.4% (2006 est.)
GDP per inhabitantUnemployment rate
$43,500 (2006 est.)4.8% (2006 est.)
Population below poverty lineInflation rate
12% (2004 est.)2.5% (2006 est.)
ExportsImports
$1.024 trillion f.o.b. (2006 est.)$1.869 trillion f.o.b. (2006 est.)
Reserves of foreign exchange and goldCurrency
$69.19 billion (August 2006 est.)US dollar (USD)
Military expenditures
4.06% (2005 est.)


Geography  GeographyTop of page
LocationArea
North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico 9,826,630 sq km
ClimateNatural resources
mostly temperate, but tropical in Hawaii and Florida, arctic in Alaska, semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest; low winter temperatures in the northwest are ameliorated occasionally in January and February by warm chinook winds from the eastern slopes of the Rocky Mountainscoal, copper, lead, molybdenum, phosphates, uranium, bauxite, gold, iron, mercury, nickel, potash, silver, tungsten, zinc, petroleum, natural gas, timber


Communication  CommunicationTop of page
CellularsInternet code
219.4 million (2005).us
Internet hostsInternet users
195.139 million (2005)205.327 million (2005)


Transportation  TransportationTop of page
AirportsRailways (in km)
14,858 (2006)226,605 km
Roadways (in km)Pipelines (in km)
6,430,366 km petroleum products 244,620 km; natural gas 548,665 km (2003)