A potlatch is a gift-giving feast practiced by Indigenous peoples of the Pacific Northwest Coast of Canada and the United States, among whom it is traditionally the primary governmental institution, legislative body, and economic system. This includes the Heiltsuk, Haida, Nuxalk, Tlingit, Makah, Tsimshian, Nuu-chah-nulth, Kwakwaka'wakw, and Coast Salish cultures. Potlatches are also a common feature of the peoples of the Interior and of the Subarctic adjoining the Northwest Coast, although mostly without the elaborate ritual and gift-giving economy of the coastal peoples.

The Indigenous peoples of the Pacific Northwest Coast are composed of many nations and tribal affiliations, each with distinctive cultural and political identities. They share certain beliefs, traditions and practices, such as the centrality of salmon as a resource and spiritual symbol, and many cultivation and subsistence practices. The term Northwest Coast or North West Coast is used in anthropology to refer to the groups of Indigenous people residing along the coast of what is now called British Columbia, Washington State, parts of Alaska, Oregon, and Northern California. The term Pacific Northwest is largely used in the American context.