RCW may refer to
* Rare Coin Wholesalers
* Ramial Chipped Wood
* Runtime Callable Wrapper in Microsoft Component Object Model and .NET interoperability
* Revolutionary Championship Wrestling, a professional wrestling promotion
* RCW Catalogue, an astronomical catalogue
* Revised Code of Washington, laws and statutes effective in the jurisdiction of Washington state
* Return to Castle Wolfenstein, a video game originally published in 2001
* Red cockaded woodpecker, an endangered woodpecker native to the southeastern United States.
* Riot City Wrestling, a professional wrestling promotion
* Russian Civil War, a civil war that took place between 1918–20 following the 1917 Russian Revolution
* Rwandan Civil War, a conflict in Rwanda between 1990–1994
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