United States

The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 340 million.

Paleo-Indians migrated from North Asia to North America over 12,000 years ago, and formed various civilizations. Spanish colonization established Spanish Florida in 1513, the first European colony in what is now the continental United States. British colonization followed with the 1607 settlement of Virginia, the first of the Thirteen Colonies. Forced migration of enslaved Africans supplied the labor force to sustain the Southern Colonies' plantation economy. Clashes with the British Crown over taxation and lack of parliamentary representation sparked the American Revolution, leading to the Declaration of Independence on July 4, 1776. Victory in the 1775–1783 Revolutionary War brought international recognition of U.S. sovereignty and fueled westward expansion, dispossessing native inhabitants. As more states were admitted, a North–South division over slavery led the Confederate States of America to attempt secession and fight the Union in the 1861–1865 American Civil War. With the United States' victory and reunification, slavery was abolished nationally. By 1900, the country had established itself as a great power, a status solidified after its involvement in World War I. Following Japan's attack on Pearl Harbor in 1941, the U.S. entered World War II. Its aftermath left the U.S. and the Soviet Union as rival superpowers, competing for ideological dominance and international influence during the Cold War. The Soviet Union's collapse in 1991 ended the Cold War, leaving the U.S. as the world's sole superpower.

The U.S. national government is a presidential constitutional federal republic and representative democracy with three separate branches: legislative, executive, and judicial. It has a bicameral national legislature composed of the House of Representatives (a lower house based on population) and the Senate (an upper house based on equal representation for each state). Federalism grants substantial autonomy to the 50 states. In addition, 574 Native American tribes have sovereignty rights, and there are 326 Native American reservations. Since the 1850s, the Democratic and Republican parties have dominated American politics, while American values are based on a democratic tradition inspired by the Enlightenment movement.

A developed country, the U.S. ranks high in economic competitiveness, innovation, and higher education. Accounting for over a quarter of nominal global economic output, its economy has been the world's largest since about 1890. It is the wealthiest country, with the highest disposable household income per capita among OECD members, though its wealth inequality is one of the most pronounced in those countries. Shaped by centuries of immigration, the culture of the U.S. is diverse and globally influential. Making up more than a third of global military spending, the country has one of the strongest militaries and is a recognized nuclear state. A member of numerous international organizations, the U.S. plays a major role in global political, cultural, economic, and military affairs.

President: Donald Trump

Area: 9,833,520 km²

Population: 347,377,392

GDP (nominal): $29.91 Trillion

GDP per Capita (nominal): $87,627

Average Climate in Washington DC, United States (2024)

	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Average Temperature	4°C	7°C	11°C	15°C	20°C	26°C	28°C	26°C	22°C	17°C	13°C	6°C
Average Humidity	69%	63%	61%	62%	73%	58%	63%	67%	72%	62%	59%	64%
Average Pressure	1017 mbar	1016 mbar	1016 mbar	1014 mbar	1013 mbar	1014 mbar	1016 mbar	1016 mbar	1018 mbar	1020 mbar	1017 mbar	1022 mbar

American Subdivisions

States/Regions	Capital	Area
Minnesota	Saint Paul	225,163 km²
Washington	Olympia	184,827 km²
Idaho	Boise	216,444 km²
Montana	Helena	380,800 km²
North Dakota	Bismarck	183,125 km²
Michigan	Lansing	250,493 km²
Maine	Augusta	91,646 km²
Ohio	Columbus	116,096 km²
New Hampshire	Concord	24,216 km²
New York	Albany	141,298 km²
Vermont	Montpelier	24,923 km²
Pennsylvania	Harrisburg	119,283 km²
Arizona	Phoenix	295,254 km²
California	Sacramento	423,970 km²
New Mexico	Santa Fe	314,915 km²
Texas	Austin	695,662 km²
Alaska	Juneau	1,723,337 km²
Louisiana	Baton Rouge	135,000 km²
Mississippi	Jackson	125,443 km²
Alabama	Montgomery	135,765 km²
Florida	Tallahassee	170,312 km²
Georgia	Atlanta	153,909 km²
South Carolina	Columbia	82,933 km²
North Carolina	Raleigh	139,391 km²
District of Columbia		177 km²
Maryland	Annapolis	32,133 km²
Delaware	Dover	6,450 km²
New Jersey	Trenton	22,591 km²
Connecticut	Hartford	14,356 km²
Rhode Island	Providence	4,001 km²
Massachusetts	Boston	27,363 km²
Oregon	Salem	254,806 km²
Hawaii	Honolulu	28,311 km²
Utah	Salt Lake City	219,887 km²
Wyoming	Cheyenne	253,335 km²
Nevada	Carson City	286,382 km²
Colorado	Denver	269,837 km²
South Dakota	Pierre	199,729 km²
Nebraska	Lincoln	200,356 km²
Kansas	Topeka	213,100 km²
Oklahoma	Oklahoma City	180,519 km²
Iowa	Des Moines	145,747 km²
Missouri	Jefferson City	180,560 km²
Wisconsin	Madison	169,640 km²
Illinois	Springfield	149,997 km²
Kentucky	Frankfort	104,656 km²
Arkansas	Little Rock	137,732 km²
Tennessee	Nashville	109,247 km²
West Virginia	Charleston	62,755 km²
Indiana	Indianapolis	94,321 km²
Virginia	Richmond	110,786 km²