ACW
ACW is an abbreviation for:
- Agroscope Changins-Wädenswil , collective name for the three research institutes of the Swiss Federal Office for Agriculture
- American Civil War , Civil War from 1861 to 1865 between the southern and northern states
- Arts Council of Wales in Wales , part of the United Kingdom
- Athletic Club Wrestling Germany, see Wrestling
- Atlantic City Airport in the state of New Jersey, USA according to the IATA code
- Automated Call Waiting , term used in telephony