Stevens County is a county located in the U.S. state of Washington along the Canada–US border. At the 2020 census, its population was 46,445. As of July 2021, the population was estimated to be 47,426. The county seat and largest city is Colville. The county was created in 1863 and named after Isaac Stevens, the first governor of Washington Territory.

Colville is a city in Stevens County, Washington, United States. The population was 4,917 at the 2020 census. It is the county seat of Stevens County.