There are 15 US Post Offices in Stevens County serving a total of 43,961 residents equating to 2,931 residents per post office. It's estimated that approximately 70,167 packages are handled across the 15 county post offices annually. Stevens County is a county located in the U.S. state of Washington along the Canada\u2013US border. As of the 2014 United States Census, its population was 43,650. 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. Stevens County is included in the Spokane-Spokane Valley, WA Metropolitan Statistical Area."