Pend Oreille County is a county located in the northeast corner of the U.S. state of Washington, along the Canada–US border. As of the 2020 census, the population was 13,401. The county seat and largest city is Newport. The county was created out of Stevens County on March 1, 1911. It is the most recently formed of the state's 39 counties. It is named after the Pend d'Oreilles tribe, who in turn were ostensibly named for large shell earrings that members wore.