Williamstown High School may refer to:

Williamstown High School (Kentucky) — Williamstown, Kentucky Williamstown High School (New Jersey) — Williamstown, New Jersey Williamstown High School (Pennsylvania) — Williamstown, Pennsylvania Williamstown High School (West Virginia) — Williamstown, West Virginia Williamstown High School (Victoria) — Williamstown, Victoria, Australia Altmar-Parish-Williamstown High School — Parish, New York

See also: Williamston High School