The Tsimshian are an Indigenous people of the Pacific Northwest Coast of North America. Their communities are mostly in coastal British Columbia in Terrace and Prince Rupert, and Metlakatla, Alaska on Annette Island, the only reservation in Alaska.

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.