West Coast of the United States
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The West Coast of the United States, also known as the Pacific Coast and the Western Seaboard, is the coastline along which the Western United States meets the North Pacific Ocean. The term typically refers to the contiguous U.S. states of
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
,
Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
, and Washington, but it occasionally includes
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
and
Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
in bureaucratic usage. For example, the U.S. Census Bureau considers both states to be part of a larger U.S. geographic division.


Definition

There are conflicting definitions of which states comprise the West Coast of the United States, but the West Coast always includes
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
,
Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
, and Washington as part of that definition. Under most circumstances, however, the term encompasses the three contiguous states and
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
, as they are all located in North America. For census purposes,
Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
is part of the West Coast, along with the other four states. ''
Encyclopædia Britannica The is a general knowledge, general-knowledge English-language encyclopaedia. It has been published by Encyclopædia Britannica, Inc. since 1768, although the company has changed ownership seven times. The 2010 version of the 15th edition, ...
'' refers to the North American region as part of the Pacific Coast, including Alaska and
British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...
. Although the encyclopedia acknowledges the inclusion of Hawaii in some capacity as part of the region, the editors wrote that "it has little in common geologically with the mainland states." Several dictionaries offer different definitions of the West Coast.
Lexico ''Lexico'' was a dictionary website that provided a collection of English and Spanish dictionaries produced by Oxford University Press (OUP), the publishing house of the University of Oxford. While the dictionary content on ''Lexico'' came from ...
restricts the West Coast's definition to "the western seaboard of the U.S. from Washington to California." However, Macmillan Dictionary provides a less specific definition as "the western coast of the U.S., along the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
." As for the
Cambridge Dictionary The ''Cambridge Advanced Learner's Dictionary'' (abbreviated ''CALD'') is a British dictionary of the English language. It was first published in 1995 under the title ''Cambridge International Dictionary of English'' by the Cambridge Univer ...
, the West Coast is "the area of the Pacific coast in the U.S. that includes California."


History

The history of the West Coast begins with the arrival of the earliest known humans of the Americas, Paleo-Indians, crossing the Bering Strait from
Eurasia Eurasia ( , ) is a continental area on Earth, comprising all of Europe and Asia. According to some geographers, Physical geography, physiographically, Eurasia is a single supercontinent. The concept of Europe and Asia as distinct continents d ...
into North America over a land bridge, Beringia, that existed between 45,000 BCE and 12,000 BCE (47,000–14,000 years ago). Small isolated groups of hunter-gatherers migrated alongside herds of large herbivores far into
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
. Between 16,500 BCE and 13,500 BCE (18,500–15,500 years ago), ice-free corridors developed along the Pacific coast and valleys of North America and possibly by sea. Alaska Natives, Indigenous peoples of the Pacific Northwest Coast, and California indigenous peoples eventually descended from the Paleo-Indians. They developed various languages and established
trade routes A trade route is a Logistics, logistical network identified as a series of pathways and stoppages used for the commercial transport of cargo. The term can also be used to refer to trade over land or water. Allowing Good (economics and accounting ...
. Later, Spanish, British, French, Russian, and American explorers and settlers began colonizing the area. On May 10, 1869, the first transcontinental railroad was completed joining the West Coast to the East of the United States.


Climate

The West Coast of the United States has an oceanic climate in its Northwestern, Northern, and Eastern edge towards the U.S.-Canada border, but from Northern California, towards the U.S.-Mexico border the climate is
Mediterranean The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern ...
. While the northern half of the west coast, particularly coastal Washington and Oregon has moderate rainfall, particularly during the winter months, much of coastal California is drier year-round. The coastline sees significantly milder temperatures compared to inland areas during summer. In far Northern California there is a difference of 17 °C (30 °F) between Eureka and Willow Creek despite only 25 miles (40 km) separating the locations and Willow Creek being located at a elevation. Slightly narrower fluctuations can be seen all through the coastline, and could partially be explained by the cold currents in the Pacific Ocean moderating coastal temperatures and the mountain ranges blocking the maritime air from moving farther inland than its foothills during summer. Coastal fog is also prevalent in keeping shoreline temperatures cool. While famous in the
San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...
, coastal fog also affects
Santa Monica Santa Monica (; Spanish language, Spanish: ''Santa Mónica'') is a city in Los Angeles County, California, Los Angeles County, situated along Santa Monica Bay on California's South Coast (California), South Coast. Santa Monica's 2020 United Sta ...
in
Los Angeles Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
, Southern California, leading to May gray and June gloom conditions. Coastal California has very little yearly temperature differences with cool summers similar to those expected in parts of
Northern Europe The northern region of Europe has several definitions. A restrictive definition may describe northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54th parallel north, 54°N, or may be based on other ge ...
in San Francisco but warmer temperatures year-round further south. A short journey inland and summer temperatures are comparable with the rest of the United States on the same latitudes, sometimes warmer due to prevailing winds from the
Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...
and
Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
hot desert climate.


Government and politics

With the exception of
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
, the Democratic Party has dominated West Coast politics in contemporary history, with the states consistently voting for Democrats in elections at various levels. Four out of five West Coast states have voted for Democrats in presidential elections since 1992, three of which have done so since 1988.


State governments


Ideology and party strength

In politics, the West Coast usually refers to the contiguous coastal states of California, Oregon, and Washington because of their similar political leanings. In 2017, '' The Oregonian'' columnist David Sarasohn described the West Coast as a " blue wall" of shared values on
immigration Immigration is the international movement of people to a destination country of which they are not usual residents or where they do not possess nationality in order to settle as Permanent residency, permanent residents. Commuting, Commuter ...
,
abortion Abortion is the early termination of a pregnancy by removal or expulsion of an embryo or fetus. Abortions that occur without intervention are known as miscarriages or "spontaneous abortions", and occur in roughly 30–40% of all pregnan ...
,
climate change Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in ...
, and civil liberties. By 2016, the West Coast states legalized marijuana after California voted to do so. According to a 2019
Pew Research Center The Pew Research Center (also simply known as Pew) is a nonpartisan American think tank based in Washington, D.C. It provides information on social issues, public opinion, and demographic trends shaping the United States and the world. It ...
poll, 72% of adults in Pacific states said that "climate change is affecting their local community at least some", higher than in any other region in the country. Since 1992, the three states have voted for Democrats in presidential elections without interruption, but Oregon and Washington also voted for the Democratic presidential candidate in 1988. In the 2010s, Democrats strengthened their political power along the West Coast. After winning a special election for a seat in the Washington state senate in 2017, Democrats built a
government trifecta A government trifecta is a political situation in which the same political party controls the Executive (government), executive branch and both chambers of the legislative branch in countries that have a Bicameralism, bicameral legislature and a ...
in all three West Coast states. After the 2022 U.S. House of Representatives elections, Democrats controlled all congressional districts touching the Pacific. Hawaii is not usually considered part of the West Coast in the political definition, though it is considered a Democratic stronghold. Before achieving statehood in 1959, Hawaii became a state favorable to Democrats to the point that they sought statehood for the territory. Southern Democrats opposed the move because it would mean additional votes against their region on several issues. Since achieving statehood, Hawaii consistently voted for Democrats in presidential elections, except in
1972 Within the context of Coordinated Universal Time (UTC) it was the longest year ever, as two leap seconds were added during this 366-day year, an event which has not since been repeated. (If its start and end are defined using Solar time, ...
and 1984. Unlike the other West Coast states, Alaska has been a reliable state for Republicans in presidential elections. Since achieving statehood, Alaska has voted for the Democratic presidential candidate only once in 1964. In 1960, the state narrowly voted for Republican
Richard Nixon Richard Milhous Nixon (January 9, 1913April 22, 1994) was the 37th president of the United States, serving from 1969 until Resignation of Richard Nixon, his resignation in 1974. A member of the Republican Party (United States), Republican ...
over Democrat John F. Kennedy and had voted for Republicans uninterrupted since 1968. All five West Coast states united in voting for Johnson in his 1964 landslide, while in
1972 Within the context of Coordinated Universal Time (UTC) it was the longest year ever, as two leap seconds were added during this 366-day year, an event which has not since been repeated. (If its start and end are defined using Solar time, ...
and 1984, this occurred again as Nixon and Reagan got support from all 5.


Presidential election history

*Bold denotes election winner


Demographics

According to the results of the 2020 U.S. census, 16 of the 20 largest cities on the West Coast are in California. The cities of
Los Angeles Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
,
San Diego San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...
, and San Jose are all among the ten most populous in the U.S. and each has more than a million residents. Los Angeles is nearly three times more populous than San Diego. Behind these three cities,
San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
,
Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...
and Portland are respectively fourth, fifth, and sixth in population for West Coast cities. Hawaii's capital and largest city,
Honolulu Honolulu ( ; ) is the List of capitals in the United States, capital and most populous city of the U.S. state of Hawaii, located in the Pacific Ocean. It is the county seat of the Consolidated city-county, consolidated City and County of Honol ...
, is the 13th largest city, and Alaska's largest city, Anchorage, is 17th on the West Coast.


Culture

California's history first as a major Spanish colony, and later as Mexican territory, has given the lower West Coast a distinctive Hispanic-American tone, which it also shares with the rest of the Southwest. Similarly, two of the three cities in which Asian Americans have concentrated, San Francisco and Los Angeles, are located on the West Coast, with significant populations in other West Coast cities. San Francisco's Chinatown, the oldest in North America, is a noted cultural center. The West Coast also has a proportionally large share of green cities within the United States, which manifests itself in different cultural practices such as bicycling and organic gardening. Greater Los Angeles, in particular, has immense global influence due to the presence of the Hollywood film industry, and is considered the creative capital of the world due to the proportion of its population involved in the entertainment industry. Meanwhile, parts of the
San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...
are also known as Silicon Valley, due to the tremendous presence of software companies in the area, including tech giants like
Apple An apple is a round, edible fruit produced by an apple tree (''Malus'' spp.). Fruit trees of the orchard or domestic apple (''Malus domestica''), the most widely grown in the genus, are agriculture, cultivated worldwide. The tree originated ...
, Meta, and Alphabet Inc. In the
Pacific Northwest The Pacific Northwest (PNW; ) is a geographic region in Western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common ...
, Portland and Seattle are both considered among the coffee capitals of the world. While
Starbucks Starbucks Corporation is an American multinational List of coffeehouse chains, chain of coffeehouses and Starbucks Reserve, roastery reserves headquartered in Seattle, Washington. It was founded in 1971 by Jerry Baldwin, Zev Siegl, and Gor ...
originated in Seattle, both cities are known for small-scale coffee roasters and independent coffeeshops. The culture has also been significantly shaped by the environment, especially by its forests, mountains, and rain. This may account for the fact that the Northwest has many high-quality libraries and bookshops (most notably Powell's Books and the Seattle Central Library) and a "bibliophile soul". The region also has a marginal, but growing independence movement based on bioregionalism and a Cascadian identity. The Cascadian flag has become a popular image at
Seattle Sounders FC Seattle Sounders FC is an American professional association football, soccer club based in Seattle. The Sounders compete in Major League Soccer (MLS) as a member of the Western Conference (MLS), Western Conference. The club was established on ...
and Portland Timbers games. Alaska is widely known for its outdoors and its inhabitants engage in a range of activities that are unique to the state. Some of these activities can be experienced through the state's annual events, such as the Iron Dog snowmobile race from Anchorage to Nome and on to Fairbanks. Other events include the World Ice Art Championships (Fairbanks) and the Sitka Whalefest ( Sitka).


Transportation

The '' Coast Starlight'' is the main interstate passenger railroad route provided by
Amtrak The National Railroad Passenger Corporation, Trade name, doing business as Amtrak (; ), is the national Passenger train, passenger railroad company of the United States. It operates intercity rail service in 46 of the 48 contiguous United Stat ...
along the coast. BNSF Railway and the
Union Pacific Railroad The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...
own and operate railroads that connect cities on the coast. Interstate travel is also served by roads such as
Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway System, Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels thro ...
, the main high-speed north-south freeway along the West Coast. Interstate 5 follows the coast only as far north as Dana Point, California, before turning inland for much of its route. The main coastal scenic route throughout most of California is California State Route 1. From the end of SR 1 at Leggett, California, U.S. Route 101 serves as the main scenic route along the coast in far Northern California, Oregon, and Washington state. Sierra High Route is a popular trekking route. Several of the most important international airports in the United States are located along the West Coast, including Seattle–Tacoma International Airport, San Francisco International Airport, and Los Angeles International Airport. Seattle, San Francisco, and Los Angeles all connect numerous destinations around the Pacific Ocean to points throughout North America, and are often described as gateways to the Pacific Rim. The West Coast has several metropolitan areas that rank high among U.S. cities for their low impact on carbon emissions in transportation due to high adoption of
electric vehicle An electric vehicle (EV) is a motor vehicle whose propulsion is powered fully or mostly by electricity. EVs encompass a wide range of transportation modes, including road vehicle, road and rail vehicles, electric boats and Submersible, submer ...
s, high use of mass transit, and low truck mileage. A 2024 analysis ranked San Jose, San Francisco, Los Angeles, Seattle, San Diego, and Portland among the top six metropolitan areas for low transportation emissions.


See also

* British Columbia Coast *
East Coast of the United States The East Coast of the United States, also known as the Eastern Seaboard, the Atlantic Coast, and the Atlantic Seaboard, is the region encompassing the coast, coastline where the Eastern United States meets the Atlantic Ocean; it has always pla ...
* East Coast–West Coast hip hop rivalry *
Gulf Coast of the United States The Gulf Coast of the United States, also known as the Gulf South or the South Coast, is the coastline along the Southern United States where they meet the Gulf of Mexico. The list of U.S. states and territories by coastline, coastal states th ...
* Pacific Coast of Mexico * Southern California Bight * Sun Belt * Third Coast


Notes


References

{{Authority control Census regions of the United States Coasts of the Pacific Ocean West Regions of the Western United States Regions of the United States Western United States