MCW may mean:
- Maryland Championship Wrestling
- Master of Creative Writing - a postgraduate education degree offered in Australia, similar to a Master of Fine Arts in creative writing in the United States
- MCW Group Ltd - UK IT service and training provider, previously Micro Computer World
- MCW Group - Canadian Consulting Engineering and Energy Services Company
- Memphis Championship Wrestling
- Metro Cammell Weymann - former United Kingdom bus manufacturer
- Modulated continuous wave - method for transmitting continuous wave information over other types of radio emissions
- Maltese Championship Wrestling
- MiddleClassWanker
- Medical College of Wisconsin
- Micro Championship Wrestling
- Midlands Championship Wrestling (MCW)
- Mohill Championship Wrestling
- Magnificent Championship Wrestling, a Canadian professional wrestling promotion
- Mason City Municipal Airport in Mason City, Iowa (IATA Code: MCW)