Issaquah ( ) is a city in
King County,
Washington, United States. The population was 40,051 at the
2020 census.
Located in a valley and bisected by
Interstate 90
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain states, Mountain West, Great Pla ...
, the city is bordered by the
Sammamish Plateau to the north and the "
Issaquah Alps" to the south. It is home to the headquarters of the multinational retail company
Costco Wholesale Corporation. Issaquah is included in the
Seattle metropolitan area
The Seattle metropolitan area is an urban conglomeration in the U.S. state of Washington (state), Washington that comprises Seattle, its surrounding Satellite city, satellites and suburbs. The United States Census Bureau defines the Seattle–T ...
.
History
"Issaquah" is an anglicization of the Southern
Lushootseed placename /sqʷáxʷ/, meaning either "the sound of birds", "snake", or "little stream". "Squak Valley", an older name for the area, also derives from this same Native American name.
In September 1885, the then-unincorporated area was the scene of an
attack on Chinese laborers who had come to pick
hops
Hops are the flowers (also called seed cones or strobiles) of the hop plant ''Humulus lupulus'', a member of the Cannabaceae family of flowering plants. They are used primarily as a bittering, flavouring, and stability agent in beer, to whic ...
from local fields.
Three of the laborers died from gunshot wounds; seven attackers were indicted, but they were later acquitted or charges were dropped.
Shortly after becoming known as Squak, the town was briefly renamed to Gilman, an homage to Daniel Hunt Gilman, who brought railways to the town.
The city was officially incorporated by the Washington State legislature on April 29, 1892.
Initially a small mining town, the city has changed noticeably both in its appearance and economic focus. Issaquah was originally developed to service the mining industry (on the two nearby mountains that now lend their names to the
Cougar/Squak Corridor Park). As the mining deposits neared depletion in the late 1890s, other companies started to realize Issaquah's potential to support a lucrative lumber business. These companies exported timber from Issaquah and other small, local towns to Seattle and larger, rapidly growing communities throughout western Washington. These early boom industries, however, faded into a period of relative quiet by the time of the
Great Depression
The Great Depression was a severe global economic downturn from 1929 to 1939. The period was characterized by high rates of unemployment and poverty, drastic reductions in industrial production and international trade, and widespread bank and ...
.
The town's industries remained similar through most of the twentieth century, with
Boeing
The Boeing Company, or simply Boeing (), is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, and missiles worldwide. The company also provides leasing and product support s ...
providing the majority of employment in the area.
Microsoft
Microsoft Corporation is an American multinational corporation and technology company, technology conglomerate headquartered in Redmond, Washington. Founded in 1975, the company became influential in the History of personal computers#The ear ...
and other technological industries moved into
Redmond and other cities in the area, and later established operations in Issaquah itself. In June 1996,
Costco
Costco Wholesale Corporation is an American multinational corporation which operates a chain of membership-only big-box warehouse club retail stores. As of 2021, Costco is the third-largest retailer in the world, and as of August 2024, Cos ...
moved its global headquarters to Issaquah from nearby
Kirkland.
Geography
Issaquah is located east-southeast 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 ...
at the south end of
Lake Sammamish. Its neighboring cities are
Bellevue to the west and
Sammamish to the north. Issaquah resides within the
Mountains to Sound Greenway.
According to the
United States Census Bureau
The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the Federal statistical system, U.S. federal statistical system, responsible for producing data about the American people and American economy, econ ...
, the city has a total area of , of which are land and are water.
Issaquah is surrounded on three sides by what are known locally as the
Issaquah Alps:
Cougar Mountain on the west,
Squak Mountain to the south, and
Tiger Mountain to the southeast. To the north of Issaquah is Lake Sammamish. Cougar and Squak Mountains are home to sizable neighborhoods on their lower slopes, though the bulk of all three mountains are preserved in public ownership as
Squak Mountain State Park,
Cougar Mountain Regional Wildland Park
Cougar Mountain Regional Wildland Park is a regional park in King County, Washington, near the towns of Bellevue, Washington, Bellevue and Issaquah, Washington, Issaquah. The park was established in June 1983 to protect the central core of Couga ...
,
West Tiger Mountain NRCA, and
Tiger Mountain State Forest.
Geologists have noted the chemical and geological content of these three mountains to be much different from that of the Cascade Range
The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington (state), Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as m ...
, because they are not volcanic in origin, while the entire Cascade Range is postulated to have formed from volcanic action. They believe that these three mountains are the remains of a much older mountain range long since eroded by earthquakes, volcanic action, and shifting plates.
Climate
Issaquah has a
warm-summer Mediterranean climate
A Mediterranean climate ( ), also called a dry summer climate, described by Köppen and Trewartha as ''Cs'', is a temperate climate type that occurs in the lower mid-latitudes (normally 30 to 44 north and south latitude). Such climates typic ...
(
Köppen Köppen is a German surname. Notable people with the surname include:
* Bernd Köppen (1951–2014), German pianist and composer
* Carl Köppen (1833-1907), German military advisor in Meiji era Japan
* Edlef Köppen (1893–1939), German author ...
:
''Csb'') with chilly, extremely wet winters and warm, moderately humid summers. Although there is no dry season in Issaquah, winters are many times wetter than the summers. Rainfall amounts are extremely similar to the neighboring city of
Sammamish, which is 0.06 inches wetter overall, with the same summer rain amounts.
Economy
Warehouse retailer
Costco
Costco Wholesale Corporation is an American multinational corporation which operates a chain of membership-only big-box warehouse club retail stores. As of 2021, Costco is the third-largest retailer in the world, and as of August 2024, Cos ...
has been headquartered in Issaquah since 1996. Other major Issaquah employers include Microsoft,
Siemens Medical Solutions' Ultrasound Group, Overtime Technologies, Boehm's Candies, and
Darigold. Apparel wholesaler
SanMar is also headquartered in the city.
Demographics
According to a 2021 estimate, the median income for a household in the city was $132,984, and the median income for a family was $115,814. The per capita income for the city was $78,581.
According to the Washington State Office of Financial Management, Issaquah ranked 6th of 279 eligible incorporated communities in population growth between 2000 and 2005. Forbes.com ranked Issaquah the 2nd fastest-growing suburb in the state and the 89th in the nation.
2010 census
As of the
2010 census, there were 30,434 people, 12,841 households, and 8,018 families residing in the city. The population density was . There were 13,914 housing units at an average density of . The
racial makeup of the city was 74.7% White, 1.4% African American, 0.4% Native American, 17.5% Asian, 0.1% Pacific Islander, 1.8% from other races, and 4.1% from two or more races. Hispanic or Latino of any race made up 5.8% of the population.
For the same census period, there were 12,841 households, of which 33.0% had children under the age of 18 living with them, 51.9% were married couples living together, 7.9% had a female householder with no husband present, 2.7% had a male householder with no wife present, and 37.6% were non-families. 30.1% of all households were made up of individuals, and 10.9% had someone living alone who was 65 years of age or older. The average household size was 2.34, and the average family size was 2.95.
The median age in the city was 36.8 years. 23.7% of residents were under the age of 18; 5.5% were between the ages of 18 and 24; 35.5% were from 25 to 44; 22.6% were from 45 to 64; and 12.7% were 65 years of age or older. The gender makeup of the city was 47.7% male and 52.3% female.
The population has increased by 40,058 people as of the 2020 census.
2000 census
As of the
2000 census, there were 11,212 people, 4,840 households, and 2,908 families residing in the city. The population density was 1,330.9 people per square mile (514.1/km
2). There were 5,195 housing units at an average density of 616.7 per square mile (238.2/km
2). The
racial makeup of the city was 87.95% White, 0.88% African American, 0.63% Native American, 6.04% Asian, 0.11% Pacific Islander, 1.46% from other races, and 2.93% from two or more races. Hispanic or Latino of any race made up 4.95% of the population.
There were 4,840 households, out of which 29.5% had children under the age of 18 living with them, 47.3% were married couples living together, 9.6% had a female householder with no husband present, and 39.9% were non-families. 31.0% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.27 and the average family size was 2.87.
In the city the population was spread out, with 22.2% under the age of 18, 7.3% from 18 to 24, 36.5% from 25 to 44, 24.0% from 45 to 64, and 10.0% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 91.9 males. For every 100 females age 18 and over, there were 88.1 males.
The median income for a household in the city was $57,892, and the median income for a family was $77,274. Males had a median income of $55,049 versus $36,670 for females. The
per capita income
Per capita income (PCI) or average income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year.
In many countries, per capita income is determined using regular population surveys, such ...
for the city was $34,222. About 3.4% of families and 4.8% of the population were below the
poverty line
The poverty threshold, poverty limit, poverty line, or breadline is the minimum level of income deemed adequate in a particular country. The poverty line is usually calculated by estimating the total cost of one year's worth of necessities for ...
, including 5.5% of those under age 18 and 4.7% of those age 65 or over.
Transportation
Highways and roads
Issaquah is bisected by
Interstate 90
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain states, Mountain West, Great Pla ...
, which runs from
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 ...
to
Boston
Boston is the capital and most populous city in the Commonwealth (U.S. state), Commonwealth of Massachusetts in the United States. The city serves as the cultural and Financial centre, financial center of New England, a region of the Northeas ...
, and
Washington State Route 900, which connects the city to neighboring
Renton. There is a chronic
traffic congestion
Traffic congestion is a condition in transport that is characterized by slower speeds, longer trip times, and increased vehicular queueing. Traffic congestion on urban road networks has increased substantially since the 1950s, resulting in m ...
problem on Front Street, which traverses the historic downtown. Proposals have been made to create a bypass, but opponents have argued that this will only result in more sprawl in the area beyond downtown and thus bring in more traffic and pollution. In 2008, the Issaquah City Council voted to cancel the 15-year-running SE Bypass project. In addition,
King County has no funding in its seven-year capital plan to improve Issaquah-Hobart Road, the southern terminus of the proposed bypass.
Public transportation
Bus service in Issaquah is provided by
King County Metro
King County Metro, officially the King County Metro Transit Department and often shortened to Metro, is the public transit authority of King County, Washington, which includes the city of Seattle. It is the eighth-largest transit bus agency in t ...
as well as regional
Sound Transit
Sound Transit (ST), officially the Central Puget Sound Regional Transit Authority, is a public transit agency serving the Seattle metropolitan area in the U.S. state of Washington (state), Washington. It manages the Link light rail system in Se ...
routes to
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
Bellevue. There are two primary
park-and-rides in the city, at Issaquah Transit Center and
Issaquah Highlands Park & Ride, which have a total of 1,999 parking spaces. Since August 1995, the city and
King County Metro
King County Metro, officially the King County Metro Transit Department and often shortened to Metro, is the public transit authority of King County, Washington, which includes the city of Seattle. It is the eighth-largest transit bus agency in t ...
provided a free circulator bus (route 200) between business districts and community centers in Issaquah as a form of traffic congestion relief.
As part of the expansion of
Sound Transit
Sound Transit (ST), officially the Central Puget Sound Regional Transit Authority, is a public transit agency serving the Seattle metropolitan area in the U.S. state of Washington (state), Washington. It manages the Link light rail system in Se ...
services, a
Link light rail
Link light rail is a light rail system with some rapid transit characteristics that serves the Seattle metropolitan area in the U.S. state of Washington (state), Washington. It is managed by Sound Transit in partnership with local transit pro ...
line to Issaquah from Bellevue is proposed to begin service by 2044. The
4 Line will terminate in Issaquah and was funded by the
Sound Transit 3 ballot measure, which was passed by voters in 2016.
Local attractions
Issaquah Alps
The
Issaquah Alps are a range of highlands situated around the city of Issaquah that include hiking trails and other outdoor activities. It is primarily composed of three distinct peaks:
Tiger Mountain,
Cougar Mountain, and
Squak Mountain.
Paragliders and
hang gliders launch from Poo Poo Point on Tiger Mountain in the Issaquah Alps. Several popular
trailheads in the area are served by
Trailhead Direct, a shuttle bus service managed by
King County Metro
King County Metro, officially the King County Metro Transit Department and often shortened to Metro, is the public transit authority of King County, Washington, which includes the city of Seattle. It is the eighth-largest transit bus agency in t ...
.
Issaquah Valley Trolley

The
Issaquah Valley Trolley was a
heritage trolley service operated by the Issaquah Historical Society on a section of the city's remaining railroad tracks from the
Issaquah Depot to Gilman Village. A pilot was organized from 2001 to 2002 with cars borrowed from
Yakima Valley Trolleys and followed by the Issaquah Historical Society's acquisition of their own three cars in 2010.
Regular public rides started in October 2012
and operated seasonally on weekends until November 2020, when it was discontinued permanently because of increased costs and insufficient funding.
Village Theatre
The
Village Theatre has presented live stage plays on its main stage in downtown Issaquah since 1979. It was originally located in a converted movie theater and later built its main stage at the Francis J. Gaudette Theatre in 1993. Village Theatre is an
Equity theater and has an affiliated theater in
Everett.
Salmon hatchery and festival
The Issaquah Salmon Hatchery on
Issaquah Creek is a state-owned
fish hatchery
A fish hatchery is a place for artificial breeding, hatching, and rearing through the early life stages of animals—finfish and shellfish in particular.Crespi V., Coche A. (2008) Food and Agriculture Organization of the United Nations (FAO) Gloss ...
that was built in 1936 by the federal
Works Project Administration
The Works Progress Administration (WPA; from 1935 to 1939, then known as the Work Projects Administration from 1939 to 1943) was an American New Deal agency that employed millions of jobseekers (mostly men who were not formally educated) to c ...
. It annually raises about
Chinook and
Coho COHO, short for Coherent Oscillator, is a technique used with radar systems based on the cavity magnetron to allow them to implement a moving target indicator display. Because the signals are only coherent when received, not transmitted, the concept ...
salmon and is the most visited hatchery in Washington with an estimated 350,000 visitors annually.
Issaquah Salmon Days is an annual two-day festival held in Issaquah during early October to celebrate the return of spawning salmon to the area. It includes a parade, arts and crafts conventions, live entertainment and music, and sporting events.
In 2005, the register revealed over 400,000 people attended the Salmon Days Festival.
Cougar Mountain Zoo

The
Cougar Mountain Zoo is located on west of Issaquah on the north slope of Cougar Mountain. The zoo was founded in 1972 and is home to many
endangered
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...
birds and animals, as well as cougars, lemurs, reindeer, and wallabies. In 2007, the zoo added two
Bengal tiger
The Bengal tiger is a population of the ''Panthera tigris tigris'' subspecies and the nominate tiger subspecies. It ranks among the largest wild cats alive today. It is estimated to have been present in the Indian subcontinent since the Late ...
cubs who had been raised in a Florida preserve.
Gilman Village
Gilman Village is a shopping center created in 1972 from historic residential and commercial buildings that were moved and renovated for use as independent shops and restaurants. The complex has 27 buildings with various businesses, including specialty shops. The shopping center was designed by Baylis Architects, Richard Haag Associates, and landscape architect Stephen G. Ray.
High Alpine Chapel
The High Alpine Chapel opened in 1981 on the grounds of the Boehm's candy shop near downtown Issaquah. It was designed to resemble a 12th-century Swiss church and can hold 57 people. The chapel includes a memorial to deceased mountaineers.
Government

The City of Issaquah uses the
mayor-council form of government. The City Council acts as the legislative body. The City Council consists of seven councilmembers, who each have four-year terms in staggered tranches.
Mary Lou Pauly was elected mayor of Issaquah in 2017 with 64.19% of the vote. She was re-elected in 2021 to another term.
In 2023, Issaquah became the first Washington city to be awarded
LEED Gold certification for its environmental conservation and sustainability initiatives.
Education
Public education for 21,358 students within the city and surrounding area is provided by the
Issaquah School District
Issaquah School District No. 411 is a public school district in King County, Washington. It is headquartered in Issaquah, Washington.
As of the 2018–2019 school year, the district has an enrollment of 20,965 students with 24 total schools.
...
,
which operates 28 schools in and around Issaquah.
This school district includes the southern part of Sammamish with the zip code 98075. This area also includes the northern part of
Renton.
Healthcare
Swedish Medical Center opened a full-service hospital and healthcare facility in the Issaquah Highlands with a capacity of 175 inpatient beds and a 24-hour emergency room in November 2011. The campus also includes medical offices and specialty care facilities. Bellevue-based
Overlake Hospital Medical Center also petitioned the state government to open a hospital in Issaquah, but lost to Swedish's bid.
Notable people
*
Stella Alexander, first female mayor
*
Ray Allen
Walter Ray Allen Jr. (born July 20, 1975) is an American former professional basketball player. Allen played 18 seasons in the National Basketball Association (NBA) and was inducted into the Naismith Memorial Basketball Hall of Fame as a play ...
, former basketball player for the
Seattle SuperSonics
*
Cody Baker, soccer player
*
Brian Basset, comic strip artist
*
Isaac Brock, musician and songwriter for
Modest Mouse
Modest Mouse is an American rock music, rock band formed in 1993 in Issaquah, Washington, and currently based in Portland, Oregon. The founding members were lead singer/guitarist Isaac Brock (musician), Isaac Brock, drummer Jeremiah Green and ba ...
*
Jay Buhner, former baseball player
*
Deb Caletti, author
*
David Call, actor
*
Bryan Clay, Olympic decathlon athlete
*
Colin Curtis, former baseball player
*
Joseph C. Decuir, electrical engineer and
IEEE
The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines.
The IEEE ...
fellow
*
Cynthia Geary, actress
*
Ken Griffey Jr., former baseball player for the
Seattle Mariners
The Seattle Mariners are an American professional baseball team based in Seattle. The Mariners compete in Major League Baseball (MLB) as a member club of the American League (AL) American League West, West Division. The team joined the American ...
*
Byron Howard, animated film director
*
Margaret Larson, journalist
*
Phil Lucas, documentary filmmaker
*
Patrick Monahan, lead singer of rock band
Train
A train (from Old French , from Latin">-4; we might wonder whether there's a point at which it's appropriate to talk of the beginnings of French, that is, when it wa ... , from Latin , "to pull, to draw") is a series of connected vehicles th ...
*
Jeff Nelson, baseball player
*
Chris Pirillo, founder and maintainer of Lockergnome and host of
Gnomedex and VloggerFair
*
J. J. Putz
Joseph Jason Putz (; born February 22, 1977) is an American former professional baseball relief pitcher. He played in Major League Baseball (MLB) for the Seattle Mariners, New York Mets, Chicago White Sox and Arizona Diamondbacks.
Early life an ...
, baseball player
*
Nate Query, bassist for
The Decemberists
The Decemberists are an American indie rock band from Portland, Oregon, formed in 2000. The band consists of Colin Meloy (lead vocals, guitar), Chris Funk (guitar, multi-instrumentalist), Jenny Conlee (piano, keyboards, accordion, backing vocals ...
*
Rick Rizzs, baseball sportscaster for the Seattle Mariners
*
Mark Rosewater, head designer of ''
Magic: The Gathering''
*
Detlef Schrempf, basketball player
*
Kyle Seager, baseball player for the Seattle Mariners
*
Paul Sorrento, former baseball player for the Seattle Mariners
*
Mel Stottlemyre
Melvin Leon Stottlemyre Sr. (November 13, 1941 – January 13, 2019) was an American professional baseball pitcher and Coach (baseball)#Pitching coach, pitching coach. He played for 11 seasons in Major League Baseball, all for the New York Yanke ...
, baseball pitching coach for the Seattle Mariners
*
Ichiro Suzuki, former baseball player for the Seattle Mariners
*
Dave Valle, former baseball player and sportscaster for the Seattle Mariners
*
Omar Vizquel, baseball player
*
Brian Yorkey, playwright, lyricist, and theatre director
Sister cities
*
Sunndal,
Norway
Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...
*
Chefchaouen,
Morocco
Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...
(since 2007)
See also
* ''
Issaquah-Sammamish Reporter''
References
External links
*
City of Issaquah official websiteIssaquah Historical Society
{{authority control
Cities in Washington (state)
Cities in King County, Washington
Cities in the Seattle metropolitan area
Populated places established in 1892
Washington (state) placenames of Native American origin