Currently, the CIA World Factbook gives 9,826,675 km 2 (3,794,100 sq mi), the United Nations Statistics Division gives 9,629,091 km 2 (3,717,813 sq mi), and the Encyclopædia Britannica gives 9,522,055 km 2 (3,676,486 sq mi) (Great Lakes area included but not coastal waters). The northern border of the United States with Canada is the world's longest bi-national land border.įrom 1989 through 1996, the total area of the US was listed as 9,372,610 km 2 (3,618,780 sq mi) (land + inland water only). The United States shares land borders with Canada and Mexico and maritime borders with Russia, Cuba, the Bahamas, and other countries, in addition to Canada and Mexico. Virgin Islands, Guam, and American Samoa, and minor outlying possessions. 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. Severe water shortages, air pollution resulting in acid rain in both the US and Canada Tsunamis volcanoes earthquake activity around Pacific Basin hurricanes along the Atlantic and Gulf of Mexico coasts tornadoes in the Midwest and Southeast mud slides in California forest fires in the west flooding permafrost in northern Alaska Vast central plain, Interior Highlands and low mountains in Midwest, mountains and valleys in the mid-south, coastal flatland near the Gulf and Atlantic coasts, complete with mangrove forests and temperate, subtropical, and tropical laurel forest and jungle, canyons, basins, plateus, and mountains in west, hills and low mountains in east intermittent hilly and mountainous regions in Great Plains, with occasional badland topography rugged mountains and broad river valleys in Alaska rugged, volcanic topography in Hawaii and the territoriesĬoal, copper, lead, molybdenum, phosphates, rare earth elements, uranium, bauxite, gold, iron, mercury, nickel, potash, silver, tungsten, zinc, petroleum, natural gas, timber, arable land West: mostly semi-arid to desert, Mountains: alpine, Northeast: humid continental, Southeast: humid subtropical, Coast of California: Mediterranean, Pacific Northwest: cool temperate oceanic, Alaska: mostly subarctic, Hawaii, South Florida, and the territories: tropical
Map of the United States showing the 50 states, the District of Columbia and the 5 major U.S.
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