Spokane Valley is a city in Spokane County, Washington, United States, and the largest suburb of Spokane. It is located east of Spokane, west of Coeur d'Alene, Idaho, and surrounds the city of Millwood on three sides. The city incorporated as the City of Spokane Valley on March 31, 2003. The population was 102,976 at the 2020 census, making it the ninth-most populous city in Washington state. Spokane Valley is named after the valley of the Spokane River, in which it is located.