Issaquah is a city in King County, Washington, United States. The population was 30,434 at the 2010 census.
"Issaquah" is an anglicized word for a local Native American name, 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.Issaquah was originally developed to service the mining industry on nearby Squak and Cougar mountain, and began as the town of Gilman, Washington. In the late 1890s, other companies started to realize Issaquah's potential to support a lucrative lumber business. Boeing and Microsoft have significantly affected Issaquah's history, cultural development, and diverse population through their active community participation and attraction of outside residents. In June 1996, Costco moved its global headquarters to Issaquah from nearby Kirkland, Washington.