CDN may refer to:
Technology Content delivery network, on the Internet Change detection and notification, for Web pages
Transportation Former ICAO airline code for Canadian Airlines Coulsdon Town railway station, England, station code Croydon railway station, Melbourne, Australia, station code
Media CDN Publishing Co., owner of the former Chicago Daily News Current Developments in Nutrition, a journal
Organizations Cártel del Noreste, a Mexican drug cartel
Other uses CDN$, an abbreviation for the Canadian dollar Centro Dramático Nacional, the national theatre of Spain CDN 37, a Dominican Republic television station