The Klallam are a Coast Salish people Indigenous to the northern Olympic Peninsula. The language of the Klallam is the Klallam language, a language closely related to the North Straits Salish languages. The Klallam are today citizens of four recognized bands: Three federally-recognized tribes in the United States and one band government in Canada. Two Klallam tribes, the Jamestown S'Klallam and Lower Elwha Klallam, live on the Olympic Peninsula, and one, the Port Gamble S'Klallam, on the Kitsap Peninsula in Washington state. In Canada, the Scia'new First Nation is based at Becher Bay on southern Vancouver Island in British Columbia.

Clallam County is a county in the U.S. state of Washington. As of the 2020 census, the population was 77,155, with an estimated population of 77,805 in 2022. The county seat and largest city is Port Angeles; the county as a whole comprises the Port Angeles, WA Micropolitan Statistical Area. 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 Canada–US border, as British Columbia's Vancouver Island is across the strait.