ACHS may refer to:
- Adolfo Camarillo High School, Camarillo, California
- 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
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