ACW
# ACW

ACW may refer to:

## Military

* American Civil War
* Air Control Wing, e.g.:
   * 116th Air Control Wing
   * 461st Air Control Wing
   * 552d Air Control Wing

## Other

* Acorn Cambridge Workstation, a microcomputer
* Ancient Christian Writers, a book series
* Anticlockwise
* Arts Council of Wales
* Ashfield–Colborne–Wawanosh, a municipality in Ontario, Canada
* ISO 639-3 code for Hejazi Arabic, a language dialect
