United States of America
Capital Washington, D.C.
Largest city New York City
National language English
Government Federal presidential constitutional republic
President Barack Obama
Vice President Joe Biden
Speaker of the House John Boehner
Chief Justice John Roberts
Legislature Congress
Upper house Senate
Lower house House of Representatives
Independence from Great Britain
Declared July 4, 1776
Recognized September 3, 1783
Constitution June 21, 1788
Current Statehood August 21, 1959
Area
Total 9,857,306 km2 ,,,,,,,,3,805,927 sq mi
2014 estimate 319,309,000