CSK may refer to:
Companies CSK Auto, a subsidiary of O'Reilly Auto Parts CSK Holdings Corporation, a Japanese IT company
Schools Carmel School (Kuwait), a Catholic school in Kuwait Chan Sui Ki (La Salle) College, a high school in Hong Kong Commission scolaire Kativik, the former French name for what is the Kativik Ilisarniliriniq
Sports CSK VVS Samara (ice hockey), a professional ice hockey team in Samara, Samara Oblast, Russia Charlottenlund SK, a Norwegian sports club Chennai Super Kings, an Indian Premier League cricket team
Other C-src tyrosine kinase, an enzyme Color shift keying Flightcraft, an American airline; see List of airline codes (F) Claremont serial killer; see Claremont serial killings Commander of the Order of the Star and Key of the Indian Ocean Country code of the former country of Czechoslovakia CSK, National Rail station code for Calstock railway station, Cornwall, England Cisauk railway station (coded CSK) in Tangerang Regency, Banten, Indonesia ISO-4217 currency code of its currency, the Czechoslovak koruna