CK, Ck, or ck may refer to:
The CKY video series were a series of videos produced by Bam Margera and Brandon DiCamillo and other residents of West Chester, Pennsylvania.
CKVR-DT, virtual channel 3 (VHF digital channel 10), is the flagship station of the CTV Two television system licensed to Barrie, Ontario, Canada and serving the Toronto, Ontario, Canada television market..
CKMI-DT, UHF channel 15, is a Global owned-and-operated television station located in Montreal, Quebec, Canada but licensed to Quebec City.
CKVU-DT, virtual channel 10 (UHF digital channel 33), is a City owned-and-operated television station located in Vancouver, British Columbia, Canada.
CKAC is a French-language Canadian radio station located in Montreal, Quebec. Owned by Cogeco, the station operates as a commercial traffic information service branded as Radio Circulation 730. Its studios are located at Place Bonaventure in Downtown Montreal, and its transmitter is located in Saint-Joseph-du-Lac.
CKGM (branded as TSN 690 Montreal) is an English language AM radio station in Montreal, Quebec, owned by Bell Media Radio.
The CKUA Radio Network is a Canadian donor-funded public radio network based in Edmonton, Alberta. Originally located on the campus of the University of Alberta in Edmonton (hence the UA of the call letters), it was the first public broadcaster in Canada.