Pend Oreille County is a county located in the U.S. state of Washington. The county is located at the northeast corner of the U.S. state of Washington, along the Canada–US border. As of the 2010 census, the population was 13,001. The county seat and largest city is Newport. The county was created out of Stevens County on March 1, 1911 and is the most recently formed county of the state's 39 counties. It is named after the Pend d'Oreilles tribe, whose name is French for "earring" (literally "hangs from ear"), which refers to the large shell earrings that these people wore.