Dialing code +1
ISO 2 code US
ISO 3 code USA
Capital Washington
Main Language English
Currency Dollar (USD)
GDP $14.3 trillion 1st
Population 310,232,863 3rd

Geography

Continent North America
Location North America bordering both the North Atlantic Ocean and the North Pacific Ocean between Canada and Mexico
Land 9,629,091 km2 3rd
Terrain Vast central plain mountains in west hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged volcanic topography in Hawaii
Climate 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 Mountains
Natural Hazards Vast central plain mountains in west hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged volcanic topography in Hawaii
Note: World's third-largest country by size (after Russia and Canada) and by population (after China and India); Mt. McKinley is highest point in North America and Death Valley the lowest point on the continent

Neighbouring Countries

Canada Cuba Mexico

History

Britain's American colonies broke with the mother country in 1776 and were recognized as the new nation of the United States of America following the Treaty of Paris in 1783. During the 19th and 20th centuries 37 new states were added to the original 13 as the nation expanded across the North American continent and acquired a number of overseas possessions. The two most traumatic experiences in the nation's history were the Civil War (1861-65) in which a northern Union of states defeated a secessionist Confederacy of 11 southern slave states and the Great Depression of the 1930s an economic downturn during which about a quarter of the labor force lost its jobs. Buoyed by victories in World Wars I and II and the end of the Cold War in 1991 the US remains the world's most powerful nation state. The economy is marked by steady growth low unemployment and inflation and rapid advances in technology.
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Demographics

Life Expectancy 78.11 years 42nd
Median Age 36.7 years 50th
Birth Rate 13.82 births/1,000 population 143rd
Death Rate 8.38 births/1,000 population 94th
Sex Ratio 0.75 male(s)/female 123rd
Literacy 99.0% 40th
Population

310.2 million

Transportation

Roadways 6.5 million km 1st
Railways 226427 km 1st
Airports 14951 1st
Waterways 41009 km 4th
Heliports 146 2nd
Airports paved 190 1st

Economy

Currency Dollar (USD)
GDP $14.3 trillion 1st
GDP per capita (PPP) $47000 9th