• The United States is: a
megadiverse country • Location (
50 states): •
Northern Hemisphere and
Western Hemisphere (except western
Aleutian Islands) •
Americas •
North America •
Northern America •
Oceania •
Polynesia •
Time zones: •
Eastern Time Zone (
UTC−05/
UTC−04 during
DST) •
Central Time Zone (
UTC−06/
UTC−05 during
DST) •
Mountain Time Zone (
UTC−07/
UTC−06 during
DST) •
Pacific Time Zone (
UTC−08/
UTC−07 during
DST) •
Alaska Time Zone (
UTC−09/
UTC−08 during
DST) •
Hawaii–Aleutian Time Zone (
UTC−10/
UTC−09 during
DST) •
Extreme points of the United States: • North:
Point Barrow,
Alaska • South:
Ka Lae,
Island of Hawai'i, Hawai'i () • East: Sail Rock, just offshore
West Quoddy Head,
Maine • Physically East: Eastern Semisopochnoi Island,
Alaska • West: Peaked Island, offshore
Cape Wrangell,
Attu Island,
Alaska • Physically West: Western Amatignak Island,
Alaska • High:
Denali,
Alaska at • Low:
Badwater Basin,
Death Valley, California at • Land boundaries: 12,034 km (7,477 mi) :: 8,893 km (5,525 mi) :: 3,145 km (1,954 mi) :*Coastline: 19,924 km (12,380 mi) •
Population of the United States: 308,745,538 (2010 census) –
3rd most populous country •
Area of the United States: –
4th most extensive country •
Atlas of the United States •
Cities of the United States, by population Environment of the United States . Lush temperate, subtropical, and tropical vegetation and low to moderately high mountains prevail throughout the humid east, and high mountains, plateaus, temperate and subtropical
savannas, and hot dry
deserts prevail in the west. •
Beaches in the United States •
Climate of the United States •
Climate change in the United States •
Environmental issues in the United States •
Ecoregions in the United States •
Geology of the United States •
Earthquakes in the United States •
National parks of the United States •
Protected areas of the United States •
Superfund sites in the United States •
Wildlife of the United States •
Flora of the United States •
Fauna of the United States •
Birds of the United States •
Mammals of the United States •
Reptiles of the United States •
Amphibians of the United States Geographic features of the United States •
Fjords of the United States •
Glaciers of the United States •
Islands of the United States •
Lakes of the United States •
Mountain peaks of the United States • The 104
highest major summits of the United States • The 129
most prominent summits of the United States • The 112
most isolated major summits of the United States •
Alaska Range •
Appalachian Mountains •
Black Hills •
Cascade Range •
Ozark Mountains •
Sierra Nevada •
Rocky Mountains •
Volcanoes of the United States •
Rivers of the United States •
Arkansas River •
Columbia River •
Colorado River •
Connecticut River •
Hudson River •
Mississippi River •
Missouri River •
Potomac River •
Rio Grande •
Ohio River •
Delaware River •
Snake River •
Susquehanna River •
Yukon River •
Waterfalls of the United States •
Valleys of the United States •
World Heritage Sites in the United States Regions of the United States •
East Coast of the United States •
West Coast of the United States •
Belt regions of the United States •
New England •
Mid-Atlantic •
The South •
Midwest •
Great Plains •
Pacific Northwest •
Southwest •
Hawaiian Archipelago Physiographic divisions of the United States The geography of the United States varies across their immense area. Within the contiguous U.S.,
eight distinct physiographic divisions exist, though each is composed of several smaller physiographic subdivisions. These major divisions are: •
Laurentian Upland – part of the
Canadian Shield that extends into the northern United States
Great Lakes area. •
Atlantic Plain – the coastal regions of the eastern and southern parts includes the continental shelf, the
Atlantic Coast and the
Gulf Coast. •
Appalachian Highlands – lying on the eastern side of the United States, it includes the
Appalachian Mountains,
Adirondacks and
New England province. •
Interior Plains – part of the interior contiguous United States, it includes much of what is called the
Great Plains. •
Interior Highlands – also part of the interior contiguous United States, this division includes the
Ozark Plateau. •
Rocky Mountain System – one branch of the
Cordilleran system lying far inland in the western states. •
Intermontane Plateaus – also divided into the
Columbia Plateau, the
Colorado Plateau and the
Basin and Range Province, it is a system of plateaus, basins, ranges and gorges between the Rocky and Pacific Mountain Systems. It is the setting for the
Grand Canyon, the
Great Basin and
Death Valley. •
Pacific Mountain System – the coastal mountain ranges and features in the
west coast of the United States.
Administrative divisions of the United States States of the United States At the
Declaration of Independence, the United States consisted of
13 states, former
colonies of the United Kingdom. In the following years, the number of
states has grown steadily due to expansion to the west, conquest and purchase of lands by the American government, and division of existing states to the current number of
50 United States: and the
uninhabited northwestern Hawaiian Islands are omitted from this map.
Territories of the United States •
United States territory •
Territorial evolution of the United States Incorporated organized territories •
none since 1959 Incorporated unorganized territories •
Palmyra Atoll Unincorporated organized territories •
Commonwealth of Puerto Rico •
Commonwealth of the Northern Mariana Islands •
Territory of Guam •
Territory of the United States Virgin Islands Unincorporated unorganized territories •
Territory of American Samoa, technically unorganized, but self-governing under a constitution last revised in 1967 •
Baker Island, uninhabited •
Howland Island, uninhabited •
Jarvis Island, uninhabited •
Johnston Atoll, uninhabited •
Kingman Reef, uninhabited •
Bajo Nuevo Bank, uninhabited (disputed with
Colombia) •
Serranilla Bank, uninhabited (disputed with Colombia) •
Midway Islands, no indigenous inhabitants, currently included in the Midway Atoll
National Wildlife Refuge •
Navassa Island, uninhabited (claimed by
Haiti) •
Wake Atoll consisting of Peale, Wake and Wilkes Islands, no indigenous inhabitants, only contractor personnel (claimed by the
Marshall Islands)
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VI Demography of the United States AK –
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VI Climate of the United States ==History of the United States==