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The term mainland United States is sometimes used synonymously with continental United States, but technically refers only to those parts of states connected to the landmass of North America, thereby excluding not only Hawaii and overseas insular areas, but also islands which are part of continental states but separated from the mainland, such ...
In the United States, a territory is any extent of region under the sovereign jurisdiction of the federal government of the United States, [1] including all waters (around islands or continental tracts). The United States asserts sovereign rights for exploring, exploiting, conserving, and managing its territory. [2]
The federal government of the United States (U.S. federal government or U.S. government) [a] is the common government of the United States, a federal republic located primarily in North America, comprising 50 states, five major self-governing territories, several island possessions, and the federal district (national capital) of Washington, D.C ...
The United States comprises 50 states: 9 of the Thirteen Colonies that were already part of the United States at the time the Constitution took effect in 1789, 4 that ratified the Constitution after its commencement, plus 37 that have been admitted since by Congress as authorized under Article IV, Section 3 of the Constitution. [2]
U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.
The United States Supreme Court has upheld the broad powers of the federal government to deal with federal lands, for example having unanimously held in Kleppe v. New Mexico [7] that "the complete power that Congress has over federal lands under this clause necessarily includes the power to regulate and protect wildlife living there, state law notwithstanding."
The West Coast of the continental United States makes up part of the Pacific Ring of Fire, an area of heavy tectonic and volcanic activity that is the source of 90% of the world's earthquakes. [28] The American Northwest sees the highest concentration of active volcanoes in the United States, in Washington , Oregon and northern California along ...
Original territory of the Thirteen States (western lands, roughly between the Mississippi River and Appalachian Mountains, were claimed but not administered by the states and were all ceded to the federal government or new states by 1802) 1783: 892,135: 2,310,619----- Annexation of the Vermont Republic: 1791: 9,616: 24,905----- Louisiana ...