The United States of America is a country in the North American continent.


  • Capital city: Washington, D.C.
  • Largest city by population: New York
  • Population: 318,070,000 (2013 estimate) 
  • Size: 9,826,675 sq km (ranked 3rd)
  • Currency: United States dollar
  • Independence: July 4, 1776 from the United Kingdom
  • Current head of state: President Barack Hussein Obama
  • Official languages: No official languages, de facto English


The United States of America (often shortened to United States, USA, US, or America) is located in the Northern and Western Hemispheres, although sections of the state of Alaska extend into the the Eastern Hemisphere, as well as some external territories.

The United States is composed of 50 states and other territories.