Total area Land area Water; State federal district or territory Rank sq mi km² Rank sq mi km² … Annually much of Florida, as well as the deep southern states, are frost-free. The upper Mississippi and some of the Ohio basin is the semi-arid prairie region, with trees originally only along the watercourses. Florida is mostly a peninsula, and has the third-largest water area and seventh-largest water area percentage. The low Atlantic coast and the hilly or mountainous Pacific coast foreshadow the leading features in the distribution of mountains within the United States.

A portion known as the Colorado Plateau, centered around the Four Corners region, is considered to have some of the most spectacular scenery in the world.

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.
San Bernardino County is the largest county in the contiguous U.S. and is larger than each of the nine smallest states; it is larger than the four smallest states combined. The listed total area changed to 9,629,091 km2 (3,717,813 sq mi) in 1997 (Great Lakes area and coastal waters added), to 9,631,418 km2 (3,718,711 sq mi) in 2004, to 9,631,420 km2 (3,718,710 sq mi) in 2006, and to 9,826,630 km2 (3,794,080 sq mi) in 2007 (territorial waters added). West of the Cascades and Sierra Nevada is a series of valleys, such as the Central Valley in California and the Willamette Valley in Oregon. The northern border of the United States with Canada is the world's longest bi-national land border. The area of Alaska is 18% of the area of the United States and 21% of the area of the contiguous United States. Other natural disasters include: tsunamis around Pacific Basin, mud slides in California, and forest fires in the western half of the contiguous U.S. The Great Basin and Columbia Plateau (the Intermontane Plateaus) are arid or semiarid regions that lie in the rain shadow of the Cascades and Sierra Nevada. All divisions presented below are as configured by the United States Census Bureau. Other places with significant snowfall outside the Cascade Range are the Wasatch Mountains in Utah, the San Juan Mountains in Colorado, and the Sierra Nevada in California. On average, the mountains of the western states receive the highest levels of snowfall on Earth.

Large stretches of desert shrub in the west can fuel the spread of wildfires. The United States is affected by a variety of natural disasters yearly. These storms are known as Nor'easters and often bring widespread, heavy rain, wind, and snowfall to New England. To faciltiate the millions of phone users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas. Temperatures can rise or drop rapidly and winds can be extreme, and the flow of heat waves or Arctic air masses often advance uninterrupted through the plains. Offshore Islands dot the Atlantic and Gulf coasts. Currently, the CIA World Factbook gives 9,826,675 km2 (3,794,100 sq mi),[7] the United Nations Statistics Division gives 9,629,091 km2 (3,717,813 sq mi),[8] and the Encyclopædia Britannica gives 9,522,055 km2 (3,676,486 sq mi)(Great Lakes area included but not coastal waters). Alaska, which is included in the term continental United States, is located at the northwestern end of North America.

Its comparatively favorable agricultural climate contributed (in part) to the country's rise as a world power, with infrequent severe drought in the major agricultural regions, a general lack of widespread flooding, and a mainly temperate climate that receives adequate precipitation. [15] These major divisions are: The Atlantic coast of the United States is low, with minor exceptions. Along the coast is a series of low mountain ranges known as the Pacific Coast Ranges. Occasional severe flooding is experienced. The Wasatch Front and Wasatch Range in Utah can also receive significant lake effect accumulations from the Great Salt Lake. Another significant (but localized) weather effect is lake-effect snow that falls south and east of the Great Lakes, especially in the hilly portions of the Upper Peninsula of Michigan and on the Tug Hill Plateau in New York. It contains the highest point in the contiguous 48 states, Mount Whitney (14,505 ft or 4,421 m). This is a complete list of the U.S. states, federal district, and its major territories ordered by total area, land area, and water area. Localized flooding can, however, occur anywhere, and mudslides from heavy rain can cause problems in any mountainous area, particularly the Southwest. The Great Plains lie west of the Mississippi River and east of the Rocky Mountains. The Appalachian Mountains form a line of low mountains separating the eastern seaboard from the Great Lakes and the Mississippi Basin. Baker Ski Area in northwestern Washington which reported 1,140 inches (2,896 cm) of snowfall for the 1998-99 snowfall season. Hawaii, far to the south of Alaska in the Pacific Ocean, is a chain of tropical, volcanic islands, popular as a tourist destination for many from East Asia and the mainland United States. Coordinates: 38°00′00″N 97°00′00″W / 38.000°N 97.000°W / 38.000; -97.000, "Geography of America" redirects here.

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. List of the largest country subdivisions by area, List of political and geographic subdivisions by total area, List of U.S. states and territories by population, "Census 2000 Geographic Terms and Concepts", "United States Summary: 2010, Population and Housing Unit Counts, 2010 Census of Population and Housing", "United States Summary: 2010, Population and Housing Unit Counts, 2000 Census of Population and Housing", "World Factbook Country Comparison: Area", List of states and territories of the United States, https://en.wikipedia.org/w/index.php?title=List_of_U.S._states_and_territories_by_area&oldid=985445193, Lists of subdivisions of the United States, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 26 October 2020, at 00:27. This coast has been defined chiefly by geologically recent crustal deformations, and hence still preserves a greater relief than that of the Atlantic. The Cascade Range, Sierra Nevada, and Rocky Mountains pick up most of the moisture from these systems as they move eastward. The capital city, Washington, District of Columbia, is a federal district located on land donated by the state of Maryland. In between these mountain systems lie the Intermontaine Plateaus. When combined with a powerful jet stream, this can lead to violent thunderstorms, especially during spring and summer. The Southwest is predominantly a low-lying desert region. Rhode Island is the smallest state by total area and land area. Some of the territories acquired were a part of United States imperialism, or to gain access to the east. The large southern portion, known as the Great Basin, consists of salt flats, drainage basins, and many small north-south mountain ranges. All regions presented below are as configured by the United States Census Bureau. The Great Plains come to an abrupt end at the Rocky Mountains. Although drought is relatively rare, it has occasionally caused major economic and social disruption, such as during the Dust Bowl (1931–1942), which resulted in widespread crop failures and dust storms, beginning in the southern Great Plains and reaching to the Atlantic Ocean. Although drought is rare, it has occasionally caused major disruption, such as during the Dust Bowl (1931–1942). The east coast Appalachian system, originally forest covered, is relatively low and narrow and is bordered on the southeast and south by an important coastal plain. The Florida Keys are a string of coral islands that reach the southernmost city on the United States mainland (Key West). Charney, Jonathan I., David A. Colson, Robert W. Smith. The Southwest has the worst droughts; one is thought to have lasted over 500 years and to have hurt Ancestral Pueblo peoples. [24] The West is affected by large wildfires each year. This system had its climax of deformation so long ago (probably in Permian time) that it has since then been very generally reduced to moderate or low relief. The contiguous forty-eight states are otherwise bounded by the Pacific Ocean on the west, the Atlantic Ocean on the east, and the Gulf of Mexico to the southeast. Area by state, federal district, or territory. These include national parks, national monuments, national forests, wilderness areas, and other areas. "United States Summary: 2010, Population and Housing Unit Counts, 2010 Census of Population and Housing", "United States Summary: 2010, Population and Housing Unit Counts, 2000 Census of Population and Housing", https://simple.wikipedia.org/w/index.php?title=List_of_U.S._states_and_territories_by_area&oldid=7166104, Creative Commons Attribution/Share-Alike License. [9] These sources consider only the 50 states and the Federal District, and exclude overseas territories. Both the Columbia River and Colorado River rise far inland near the easternmost members of the Cordilleran system, and flow through plateaus and intermontaine basins to the ocean. Other smaller Intermontane areas include the Columbia Plateau covering eastern Washington, western Idaho and northeast Oregon and the Snake River Plain in Southern Idaho. 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 Great Basin and the Southwest. The Rocky Mountain region is the highest region of the United States by average elevation. It owes its present-day altitude either to renewed elevations along the earlier lines or to the survival of the most resistant rocks as residual mountains. Within the continental U.S., eight distinct physiographic divisions exist, though each is composed of several smaller physiographic subdivisions. The mild winters of Florida allow a massive tropical fruit industry to thrive in the central part of the state, making the US second to only Brazil in citrus production in the world. Since the initial publishing of the World Factbook, the CIA has updated the total area of United States a number of times.[10]. [21] Pago Pago Harbor in American Samoa is the rainiest harbor in the world (because of the 523 meter Rainmaker Mountain). Despite being the second largest state, Texas is only 40% of the total area of largest state, Alaska. Hotei Publishing: Leiden. The water area includes inland waters, coastal waters, the Great Lakes, and territorial waters. This is a complete list of the U.S. states, federal district, and its major territories ordered by total area, land area, and water area. There are several active volcanoes located in the islands of Hawaii, including Kilauea in ongoing eruption since 1983, but they do not typically adversely affect the inhabitants of the islands.

West of the Appalachians lies the lush Mississippi River basin and two large eastern tributaries, the Ohio River and the Tennessee River. Alaska is the largest state in total area, land area, and water area.
Forty-eight of the states are in the single region between Canada and Mexico; this group is referred to, with varying precision and formality, as the contiguous United States, and as the Lower 48. [1] The United States shares land borders with Canada and Mexico and maritime borders with Russia, Cuba, the Bahamas, and other countries,[note 2] in addition to Canada and Mexico. Heavy forests cover the northwest coast, but elsewhere trees are found only on the higher ranges below the Alpine region. Once it moves over the Great Plains, uninterrupted flat land allows it to reorganize and can lead to major clashes of air masses.

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