Chief Sealth International High School (CSIHS) is a public high school in the Seattle Public Schools district of Seattle, Washington. Opened in 1957 in southern West Seattle, Chief Sealth students comprise one of the most ethnically and culturally diverse student bodies in Washington State. The school is named for Chief Seattle, a Duwamish chief and a recognized leader amongst the local peoples at the time of the arrival of European American settlers in the area. The school shares a campus with Denny International Middle School.