Stillaguamish are a Native American tribe located in northwest Washington state in the United States near the city of Arlington, Washington, near the river that bears their name, the Stillaguamish River. The tribe petitioned for recognition from the United States Government in 1974, and received recognition on February 7, 1979. The enrolled population of the tribe in 2003 was 237. The tribe helps manage salmon populations in the Stillaguamish River watershed. As part of this effort, the tribe has a hatchery which releases chinook and coho salmon, running educational activities about salmon. In addition, they voluntarily do not fish for chinook salmon on the Stillaguamish River.
The tribe operates a casino named the Angel of The Winds Casino near Arlington as a part of their income.