Located at the northwest corner of North America very near to
Asia, Alaska is the northernmost and westernmost state in the United States, but also has the most easterly longitude in the United States because the
Aleutian Islands extend into the
Eastern Hemisphere. Alaska is the only non-
contiguous U.S. state on continental North America; about of Canadian territory consisting of
British Columbia (in Canada) separates Alaska from
Washington. It is technically part of the
continental U.S., but is not usually included in the colloquial use of the term; Alaska is not part of the
contiguous U.S., often called "
the Lower 48". The capital city,
Juneau, is situated on the mainland of the North American continent but is not connected by road to the rest of the North American highway system. The largest lake in Alaska is
Lake Illiamna. Alaska is bordered by Canada's
Yukon and
British Columbia to the east (making it the only state to border only a
Canadian territory); the
Gulf of Alaska and the Pacific Ocean to the south and southwest; the
Bering Sea,
Bering Strait, and
Chukchi Sea to the west; and the Arctic Ocean to the north. Alaska's territorial waters touch Russia's territorial waters in the Bering Strait, as the Russian
Big Diomede Island and Alaskan
Little Diomede Island are only apart. Alaska has a longer coastline than all the other U.S. states combined. (
Albers equal-area conic projection) At in total area, Alaska is by far the largest state in the United States. Alaska is more than twice the size of the second-largest U.S. state (Texas), and it is larger than the next three largest states (Texas, California, and Montana) combined. Alaska is the seventh
largest subnational division in the world. If it was an independent nation, it would be the 18th largest country in the world; almost the same size as
Iran. With its myriad islands, Alaska has nearly of tidal shoreline. The Aleutian Islands chain extends west from the southern tip of the
Alaska Peninsula. Many active
volcanoes are found in the Aleutians and in coastal regions.
Unimak Island, for example, is home to
Mount Shishaldin, which is an occasionally smoldering volcano that rises to above the North Pacific. The chain of volcanoes extends to
Mount Spurr, west of Anchorage on the mainland. Geologists have identified Alaska as part of
Wrangellia, a large region consisting of multiple states and Canadian provinces in the
Pacific Northwest, which is actively undergoing
continent building. One of the world's largest tides occurs in
Turnagain Arm, just south of Anchorage, where tidal differences can be more than . Alaska has more than 409,000 natural lakes at least one hectare or bigger.
Marshlands and wetland
permafrost cover (mostly in northern, western and southwest flatlands). Glacier ice covers about of Alaska. The
Bering Glacier is the largest glacier in North America, covering alone.
Regions Southcentral The most populous region of Alaska contains
Anchorage, the
Matanuska-Susitna Valley and the
Kenai Peninsula. Rural, mostly unpopulated areas south of the
Alaska Range and west of the
Wrangell Mountains also fall within the definition of South Central, as do the
Prince William Sound area and the communities of
Cordova and
Valdez.
Southeast Also referred to as the Panhandle or
Inside Passage, this is the region of Alaska closest to the contiguous states. As such, this was where most of the initial non-indigenous settlement occurred in the years following the
Alaska Purchase. The region is dominated by the
Alexander Archipelago as well as the
Tongass National Forest, the largest national forest in the United States. It contains the state capital
Juneau, the former capital
Sitka, and
Ketchikan, at one time Alaska's largest city. The
Alaska Marine Highway provides a vital surface transportation link throughout the area and country, as only three communities (
Haines,
Hyder and
Skagway) enjoy direct connections to the contiguous North American road system.
Interior is the highest peak in North America. The Interior is the largest region of Alaska; much of it is uninhabited wilderness.
Fairbanks is the only large city in the region.
Denali National Park and Preserve is located here.
Denali, federally designated as Mount McKinley, is the highest mountain in North America and is also located here.
North Slope The North Slope is mostly
tundra peppered with small villages. The area is known for its massive reserves of crude oil and contains both the
National Petroleum Reserve–Alaska and the
Prudhoe Bay Oil Field. The city of
Utqiaġvik, formerly known as Barrow, is the northernmost city in the United States and is located here. The
Northwest Arctic area, anchored by
Kotzebue and also containing the
Kobuk River valley, is often considered part of this region. The respective
Inupiat of the North Slope and of the Northwest Arctic seldom consider themselves to be one people.
Southwest Southwest Alaska is a sparsely inhabited region stretching some inland from the Bering Sea. Most of the population lives along the coast.
Kodiak Island is also located in the Southwest. The massive
Yukon–Kuskokwim Delta, one of the largest river deltas in the world, is here. Portions of the
Alaska Peninsula are considered part of the Southwest, with the Aleutian Islands often (but not always) being grouped in as well.
Aleutian Islands (the triangular kink in the line was agreed upon the
U.S. acquisition of Alaska), the Aleutian Islands cross the
180th meridian, such that they contain both the westernmost (
Amatignak) and the easternmost (
Semisopochnoi.) points in the United States. While primarily part of Southwest Alaska when grouped economically, the Aleutian islands are sometimes recognized as an alternate group from the rest of the region due to the geographic separation from the continent. More than 300 small volcanic islands make up this chain, which stretches more than into the Pacific Ocean. Some of these islands fall in the Eastern Hemisphere, but the
International Date Line was drawn west of
180° to keep the whole state, and thus the entire North American continent, within the same legal day. Two of the islands,
Attu and
Kiska, were occupied by Japanese forces during World War II.
Land ownership As of 2023 the
United States Bureau of Land Management manages 290 million surface and subsurface acres as public lands, including a multitude of
national forests, national parks,
national wildlife refuges, and federal mineral estate land. Of these, the
Bureau of Land Management manages , or 23.8% of the state. The
Arctic National Wildlife Refuge is managed by the
United States Fish and Wildlife Service. It is the world's largest wildlife refuge, comprising . Of the remaining land area, the state of Alaska owns , its entitlement under the
Alaska Statehood Act. A portion of that acreage is occasionally ceded to the organized boroughs presented above, under the statutory provisions pertaining to newly formed boroughs. Smaller portions are set aside for rural subdivisions and other homesteading-related opportunities. These are not very popular due to the often remote and roadless locations. The
University of Alaska, as a
land grant university, also owns substantial acreage which it manages independently. Another are owned by 12 regional, and scores of local, Native corporations created under the
Alaska Native Claims Settlement Act (ANCSA) of 1971.
Regional Native corporation Doyon, Limited often promotes itself as the largest private landowner in Alaska in advertisements and other communications. Provisions of ANCSA allowing the corporations' land holdings to be sold on the open market starting in 1991 were repealed before they could take effect. Effectively, the corporations hold title (including subsurface title in many cases, a privilege denied to individual Alaskans) but cannot sell the land.
Individual Native allotments are sold on the open market. Various private interests own the remaining land, totaling about one percent of the state. Alaska is, by a large margin, the state with the smallest percentage of private land ownership when Native corporation holdings are excluded.
Alaska Heritage Resources Survey The Alaska Heritage Resources Survey (AHRS) is a restricted
inventory of all reported
historic and
prehistoric sites within the U.S. state of Alaska; it is maintained by the Office of History and Archaeology. The survey's inventory of cultural resources includes objects, structures, buildings, sites, districts, and travel ways, with a general provision that they are more than fifty years old. , more than 35,000 sites have been reported.
Cities, towns and boroughs is Alaska's largest city. , Alaska's second-largest city and by a significant margin the largest city in
Alaska's interior , Alaska's third-largest city and
its capital , the largest city in the
Unorganized Borough and in
rural Alaska , showing (from bottom to top) the edge of downtown,
its airport and
the Spit (Browerville neighborhood near
Eben Hopson Middle School shown), known colloquially for many years by the nickname "Top of the World", is the northernmost city in the United States. , built in the early 20th century to support the
Kennecott Mines and the
Copper River and Northwestern Railway, has been preserved as a fishing community since their closure. Unlike most of U.S. states, Alaska is not divided into
counties. Similarly to
Louisiana's
parishes, it is divided into
boroughs. Delegates to the
Alaska Constitutional Convention wanted to avoid the pitfalls of the traditional county system and adopted their own unique model. Many of the more densely populated parts of the state are part of Alaska's 16 boroughs, which function somewhat similarly to counties in other states. Unlike county-equivalents in the other states, the boroughs do not cover the state's entire land area. The area not part of any borough is referred to as the
Unorganized Borough. The Unorganized Borough has no government of its own, but the
U.S. Census Bureau in cooperation with the state divided the Unorganized Borough into 11
census areas solely for the purposes of statistical analysis and presentation. A
recording district is a mechanism for management of the
public record in Alaska. The state is divided into 34 recording districts which are centrally administered under a state
recorder. All recording districts use the same acceptance criteria, fee schedule, etc., for accepting documents into the public record. Whereas many U.S. states use a three-tiered system of decentralization—state/county/township—most of Alaska uses two tiers—state/borough. Owing to the low population density, most of the land is located in the
Unorganized Borough. As the name implies, it has no intermediate borough government but is administered directly by the state government. In 2000, 57.71% of Alaska's area has this status, with 13.05% of the population. In 1975, Anchorage merged the city government with the Greater Anchorage Area Borough to form the Municipality of Anchorage, containing the city proper and the communities of Eagle River, Chugiak, Peters Creek, Girdwood, Bird, and Indian. Fairbanks has a separate borough (the
Fairbanks North Star Borough) and municipality (the City of Fairbanks). Alaska's most populous city is
Anchorage, home to 291,247 people in 2020. The tally of cities includes four unified municipalities, essentially the equivalent of a
consolidated city–county. The majority of these communities are located in the rural expanse of Alaska known as "
The Bush" and are unconnected to that contiguous North American road network. The table at the bottom of this section lists the 100 largest cities and census-designated places in Alaska, in population order. Of Alaska's 2020 U.S. census population figure of 733,391, 16,655 people, or 2.27% of the population, did not live in an incorporated city or census-designated place. Alaska is the coldest state in the United States. The climate in the south and southeastern Alaska is a mid-latitude
oceanic climate (
Köppen climate classification:
Cfb), and a subarctic oceanic climate (Köppen
Cfc) in the northern parts, with cool summers and relatively mild winters. On an annual basis, the southeast is both the wettest and warmest part of Alaska with milder temperatures in the winter and high precipitation throughout the year. Juneau averages over of precipitation a year, and
Ketchikan averages over . This is also the only region in Alaska in which the average daytime high temperature is above freezing during the winter months. of Alaska The climate of
Anchorage and south central Alaska is mild by Alaskan standards due to the region's proximity to the seacoast. While the area gets less rain than southeast Alaska, it gets more snow, and days tend to be clearer. On average, Anchorage receives of precipitation a year, with around of snow, although there are areas in the south central which receive far more snow. It is a subarctic climate (
Köppen: Dfc) due to its brief, cool summers. The climate of
western Alaska is determined in large part by the
Bering Sea and the
Gulf of Alaska. It is a subarctic oceanic climate in the southwest and a continental subarctic climate farther north. The temperature is somewhat moderate considering how far north the area is. This region has a tremendous amount of variety in precipitation. An area stretching from the northern side of the Seward Peninsula to the
Kobuk River valley (i.e., the region around
Kotzebue Sound) is technically a
desert, with portions receiving less than of precipitation annually. On the other extreme, some locations between
Dillingham and
Bethel average around of precipitation. The climate of the interior of Alaska is subarctic and is a classic example of a continental subarctic climate, except in a few valleys where the climate approaches
humid continental (Köppen:
Dfb). Some of the highest and lowest temperatures in Alaska occur around the area near
Fairbanks. Summers are warm, albeit generally short, and may have temperatures reaching into the 90s °F (the low-to-mid 30s °C). In the long and very cold winters, the temperature can fall below . Precipitation is sparse in the Interior, often less than a year, but what precipitation falls in the winter tends to stay the entire winter. The highest and lowest recorded temperatures in Alaska are both in the Interior. The highest is in
Fort Yukon, which is just inside the arctic circle, on June 27, 1915, making Alaska tied with Hawaii as the state with the lowest high temperature in the United States. The lowest official Alaska temperature is in
Prospect Creek on January 23, 1971, The climate in the extreme north of Alaska, north of the
Brooks Range, is
Arctic (
Köppen: ET) with long, very cold winters and short, cool summers. Even in July, the average low temperature in
Utqiaġvik is . Precipitation is light in this part of Alaska, with many places averaging less than per year, mostly as snow which stays on the ground almost the entire year.
Fauna ==Demographics==