CRAC might refer to:
* The CRAC-II "Calculation of Reactor Accident Consequences" study.
* A castle, as in Krak des Chevaliers.
* A Computer Room Air Conditioner.
* Clube Recreativo e Atlético Catalano, a Brazilian football (soccer) club commonly known as CRAC
* Clube Recreativo Atlético Campoverdense, a Brazilian football (soccer) club commonly known as CRAC
* Chinese Radio Amateurs Club, China Radio Association Amateur Radio Working Committee, Amateur Radio Club in China commonly known as CRAC
* Chisholm Residents Activity Club, a social club for residents of Chisholm College, which provides accommodation for students at La Trobe University
* Cholesterol recognition amino acid consensus sequence
* Crac, a 1981 Academy Award, Oscar-winning animated short film
* Calcium Release Activated Channels, ion channels in cell membrane
* Reduction (orthopedic surgery), Closed Reduction And Cast, an orthopaedic surgical procedure
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