Henry M. Jackson High School is a public high school in Mill Creek, Washington, United States. Named after the late Henry M. Jackson, an Everett native and former U.S. Senator, the school opened on September 7, 1994, as the third high school in the Everett School District. Other high schools in the Everett School District are Cascade High School, Everett High School, and Sequoia Alternative School. The school initially served only grades 9–10 so that students at Everett and Cascade could graduate without transferring; it fully opened for grades 9–12 in 1996.