Waipahu Intermediate School opened its doors in September 1966 with grades 7 & 8 and a student population of about 660. In 1967, grade 9 was added and the enrollment increased to 1000. In the summer of 1969, Waipahu High School and Waipahu Intermediate School exchanged campuses. In September 1972, Waipahu High School became a four-year high school leaving us with grades 7 & 8 again. Today we have a student population of about 1200.