Western Washington is a region of the United States defined as the area of

Washington state Washington (), officially the State of Washington, is a U.S. state, state in the Northwestern United States, Pacific Northwest region of the Western United States. Named for George Washington—the first President of the United States, U.S. p ...

west of the

Cascade Mountains The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, a ...

. This region is home to the state's largest city,

Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region o ...

, the state capital, Olympia, and most of the state's residents. The climate is generally far more damp and temperate than that of

Eastern Washington Eastern Washington is the region of the U.S. state of Washington located east of the Cascade Range. It contains the city of Spokane (the second largest city in the state), the Tri-Cities, the Columbia River and the Grand Coulee Dam, the Hanf ...

Climate

Western Washington is known as having a far wetter climate than the eastern portion of the state, primarily due to the effects of the Cascades

rain shadow A rain shadow is an area of significantly reduced rainfall behind a mountainous region, on the side facing away from prevailing winds, known as its leeward side. Evaporated moisture from water bodies (such as oceans and large lakes) is ca ...

. The average location in Eastern Washington only receives an average of 46.87 centimeters (18.45 inches) of precipitation per year,http://www.wrcc.dri.edu/summary/Climsmwa.html Western Regional Climate Data Center Website whereas the average place in Western Washington receives 167.72 centimeters (66.03 inches). The average location in Western Washington gets 168 days of measurable precipitation per year.http://www.wrcc.dri.edu/htmlfiles/wa/wa.01.html Western Regional Climate Data Center, Days of Precipitation The place that receives the most recorded precipitation is

Lake Quinault Lake Quinault ( or ) is a lake on the Olympic Peninsula in western Washington state. It is located in the glacial-carved Quinault Valley of the Quinault River, at the southern edge of Olympic National Park in the northwestern United States. One ...

on the

Olympic Peninsula The Olympic Peninsula is a large arm of land in western Washington that lies across Puget Sound from Seattle, and contains Olympic National Park. It is bounded on the west by the Pacific Ocean, the north by the Strait of Juan de Fuca, a ...

, with an average of 332.92 centimeters (131.07 inches) per year. The

Long Beach Long Beach is a city in Los Angeles County, California. It is the 42nd-most populous city in the United States, with a population of 466,742 as of 2020. A charter city, Long Beach is the seventh-most populous city in California. Incorporat ...

Experimental Station has the most days of measurable precipitation, averaging 215 each year.

Population

As of the 2020 census, Western Washington was home to 6,037,688 of the state's total 7,705,281 residents, making its population comparable to that of

Missouri Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t ...

.See List of U.S. states and territories by population for the most recent state population figures. The region has a land area of , for a population density of 244.03 people per square mile (94.22 people per square kilometer).

Counties

Counties in Western Washington: * Clallam *

Clark Clark is an English language surname, ultimately derived from the Latin language, Latin with historical links to England, Scotland, and Ireland ''clericus'' meaning "scribe", "secretary" or a scholar within a religious order, referring to someone ...

Cowlitz Cowlitz may refer to: People * Cowlitz people, an indigenous people of the Pacific Northwest ** Cowlitz language, member of the Tsamosan branch of the Coast Salish family of Salishan languages * Cowlitz Indian Tribe, a federally recognized tribe o ...

Grays Harbor Grays Harbor is an estuarine bay located north of the mouth of the Columbia River, on the southwest Pacific coast of Washington state, in the United States of America. It is a ria, which formed at the end of the last ice age, when sea levels floo ...

Island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An isla ...

* Jefferson *

King King is the title given to a male monarch in a variety of contexts. The female equivalent is queen regnant, queen, which title is also given to the queen consort, consort of a king. *In the context of prehistory, antiquity and contempora ...

* Kitsap *

Lewis Lewis may refer to: Names * Lewis (given name), including a list of people with the given name * Lewis (surname), including a list of people with the surname Music * Lewis (musician), Canadian singer * "Lewis (Mistreated)", a song by Radiohead ...

* Mason *

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contine ...

* Pierce *

San Juan San Juan, Spanish for Saint John, may refer to: Places Argentina * San Juan Province, Argentina * San Juan, Argentina, the capital of that province * San Juan, Salta, a village in Iruya, Salta Province * San Juan (Buenos Aires Underground), ...

* Skagit * Skamania * Snohomish * Thurston * Wahkiakum * Whatcom

Cities of note

Major cities in Western Washington: *

Aberdeen Aberdeen (; sco, Aiberdeen ; gd, Obar Dheathain ; la, Aberdonia) is a city in North East Scotland, and is the third most populous city in the country. Aberdeen is one of Scotland's 32 local government council areas (as Aberdeen City), a ...

* Auburn * Bellevue * Bellingham *

Bremerton Bremerton is a city in Kitsap County, Washington. The population was 37,729 at the 2010 census and an estimated 41,405 in 2019, making it the largest city on the Kitsap Peninsula. Bremerton is home to Puget Sound Naval Shipyard and the Bremer ...

* Everett *

Edmonds Edmonds may refer to: * Edmonds (surname), a surname (including a list of people with the surname) * Edmonds, Washington, a city in Washington, US ** Edmonds station (Washington), a passenger train station in Washington, US * Edmonds station (SkyT ...

Federal Way Federal Way is a city in King County, Washington, United States. One of the most recently incorporated cities in the county, its population was 101,030 at the 2020 census. Federal Way is the tenth-largest city in Washington and the fifth-larg ...

* Kelso * Lake Stevens * Longview * Lynnwood *

Mount Vernon Mount Vernon is an American landmark and former plantation of Founding Father, commander of the Continental Army in the Revolutionary War, and the first president of the United States George Washington and his wife, Martha. The estate is on ...

* Olympia *

Port Angeles Port Angeles ( ) is a city and county seat of Clallam County, Washington, United States. With a population of 19,960 as of the 2020 census, it is the largest city in the county. The population was estimated at 20,134 in 2021. The city's har ...

Port Townsend Port Townsend is a city on the Quimper Peninsula in Jefferson County, Washington, United States. The population was 10,148 at the 2020 United States Census. It is the county seat and only incorporated city of Jefferson County. In addition t ...

Puyallup Puyallup may refer to: * Puyallup (tribe), a Native American tribe * Puyallup, Washington, a city ** Puyallup High School ** Puyallup School District ** Puyallup station, a Sounder commuter rail station ** Washington State Fair, formerly the ...

* Renton *

* Tacoma *

Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the most populous city in the province, the 2021 Canadian census recorded 662,248 people in the city, up from 631,486 in 2016. ...

References

{{Authority control Regions of Washington (state)