Clallam County is a county in the U.S. state of Washington. As of the 2010 census, the population was 71,404. The county seat and largest city is Port Angeles. The name is a Klallam word for "the strong people". The county was formed on April 26, 1854. Located on the Olympic Peninsula, it is south from the Strait of Juan de Fuca, which forms the Canadian border, as British Columbia's Vancouver Island is across the strait.