It serves grades 9 through 12 and is a part of the Berkeley County School District.

[2] Hanahan High School was opened in the fall of 1958 with 282 students, but demand quickly exceeded its capacity.

An additional eight-room portion was begun on June 20, 1960 along the northern side of the original building.

[3] In 1969, a science wing of 11,000 square feet was added to the eastern end of the original building.

[4] Most of the original structure and additions were demolished and rebuilt starting in 2000 according to plans by F.W.