Spokane County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 539,339, making it the fourth-most populous county in Washington. The largest city and county seat is Spokane, the second largest city in the state after Seattle. The county is named after the Spokane tribe.
Spokane County is part of the Spokane-Spokane Valley metropolitan statistical area, which is also part of the greater Spokane-Coeur d'Alene combined statistical area that includes nearby Kootenai County, Idaho.
Wikipedia https://en.wikipedia.org/wiki/Spokane_County,_Washington
Coordinates 47°39'25.896" N -117°25'24.636" E