Henry Foss High School is an American high school in Tacoma, Washington. Named after civic leader and tugboat tycoon Henry Foss, the school first opened in 1973. Foss was the first high school in Washington state to offer the International Baccalaureate (IB) program. It now has the longest-running IB Diploma Program west of the Mississippi in the USA. It is currently a part of the Tacoma Public Schools.