The United States of America ( U.S.A. or USA ), commonly known as the United States ( U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, 326 Indian reservations, and nine minor outlying islands.
The United States is a federal republic of fifty states, a federal district, and several territories. The land area of the contiguous United States is 2,959,064 square miles (7,663,941 km 2 ). Alaska, separated from the contiguous United States by Canada, is the largest state at 663,268 square miles (1,717,856 km 2 ).
t. e. The United States of America is a federal republic  consisting of 50 states, a federal district ( Washington, D.C., the capital city of the United States), five major territories, and various minor islands.   The 48 contiguous states and Washington, D.C., are in North America between Canada and Mexico.
- General characteristics
- Physiographic divisions
- Natural disasters
The term "United States", when used in the geographical sense, is the contiguous United States, the state of Alaska, the island state of Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, and American Samoa, and minor outlying possessions. The United States shares land borders with Canada and M...
From 1989 through 1996, the total area of the US was listed as 9,372,610 km2. The listed total area changed to 9,629,091 km2 in 1997, to 9,631,418 km2 in 2004, to 9,631,420 km2 in 2006, and to 9,826,630 km2 in 2007. Currently, the CIA World Factbook gives 9,826,675 km2, the United Nations Statistics Division gives 9,629,091 km2, and the Encyclopedi...
The United States shares land borders with Canada and Mexico, and a territorial water border with Russia in the northwest, and two territorial water borders in the southeast between Florida and Cuba, and Florida and the Bahamas. The contiguous forty-eight states are otherwise bounded by the Pacific Ocean on the west, the Atlantic Ocean on the east,...
The eastern United States has a varied topography. A broad, flat coastal plain lines the Atlantic and Gulf shores from the Texas-Mexico border to New York City, and includes the Florida peninsula. This broad coastal plain and barrier islands make up the widest and longest beaches in the United States, much of it composed of soft, white sands. The F...
Due to its large size and wide range of geographic features, the United States contains examples of nearly every global climate. The climate is subtropical in the Southern United States, tropical in Hawaii and southern Florida, polar in Alaska, semiarid in the Great Plains west of the 100th meridian, Mediterranean in coastal California and arid in ...
The United States is affected by a variety of natural disasters yearly. Although drought is rare, it has occasionally caused major disruption, such as during the Dust Bowl. Farmland failed throughout the Plains, entire regions were virtually depopulated, and dust storms ravaged the land.
This article is part of a series on the History of the United States Timeline and periods Prehistoric and Pre-colonial until 1607 Colonial period 1607–1765 1776–1789 American Revolution 1765–1783 Confederation Period 1783–1788 1789–1849 Federalist Era 1788–1801 Jeffersonian Era 1801–1817 Era of Good Feelings 1817–1825 Jacksonian Era 1825–1849 1849–1865 Civil War Era 1850 ...
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