ACHS

ACHS may refer to:

American schools:
 * Adolfo Camarillo High School, Camarillo, California
 * Alexandria City High School, Alexandria, Virginia
 * Allen Central High School, Eastern, Kentucky
 * American Canyon High School, American Canyon, California
 * Antioch Community High School, Antioch, Illinois
 * Archbishop Carroll High School, Washington, D.C.
 * Argo Community High School, Summit, Illinois
 * Arlington Catholic High School, Arlington, Massachusetts
 * Atlantic City High School, Atlantic City, New Jersey
 * Almeta Crawford High School, Fort Bend County, Texas

Other uses:
 * Association of College Honor Societies
 * Asociación Chilena de Seguridad (Chilean Safety Association)

Surname

 * Ken Achs, former Canadian drag racer