The following bands and tribes have all, at one point, inhabited the land on which Snohomish County now sits. For more targeted information about the land your hometown is on, visit https://native-land.ca/.
The term “Coast Salish Tribes” refers to tribes and bands that inhabited the region from the coast of what is present-day British Columbia, down to Lower Chehalis; inland along the Skagit and Fraser Rivers; along the Juan de Fuca Strait, Strait of Georgia, and Straits Salish; and surrounding the Puget Sound. These tribes also shared an overarching Central Salishan linguistic family, branching off into Lushootseed, Straits Salish (further into Klallam, and more), Twana, et cetera. See the language tree on this page on the Puyallup Tribe's website: https://www.puyalluptriballanguage.org/about/ or consult Native-Languages.org: http://www.native-languages.org/
Chimacum (small tribe related to Quileute - http://www.native-languages.org/chimakum.htm)
Port Gamble S'Klallam Tribe https://www.pgst.nsn.us/
Sauk-Suiattle Indian Tribe http://www.sauk-suiattle.com/
Skykomish Tribe http://www.native-languages.org/skykomish.htm
Snohomish Tribe of Indians http://www.snohomishtribe.com/
Snoqualmie Tribe https://www.snoqualmietribe.us/about
Stillaguamish Tribe of Indians https://www.stillaguamish.com/
Suquamish Tribe https://suquamish.nsn.us/
Swinomish Indian Tribal Community https://swinomish.org/who-we-are.aspx
Tulalip Tribes https://www.tulaliptribes-nsn.gov/WhoWeAre/AboutUs
Tribal Partnerships with Snohomish County: Federally Recognized Tribes