CTN may refer to:
Television
- bTV Action, a Bulgarian channel (formerly known as CTN)
- Cambodian Television Network, Cambodia
- Channel 31 (Sydney), which used the callsign CTN-31
- Christian Television Network, a Christian broadcast television network in the United States
- Chung T'ien Television, a television network based in Taiwan (formerly Chinese Television Network)
- Connecticut Network, or CT-N (often misidentified as CTN)
- MTVU, United States (formerly College Television Network)
Transport
- Charlton railway station (National Rail station code CTN), London, England
- Compagnie Tunisienne de Navigation, a Tunisian ferry operator
- Cooktown Airport (IATA: CTN)
- Croatia Airlines (ICAO: CTN)
Other uses
- CTN (retail), Confectionery, Tobacco, and News retailers
- CTN Animation Expo, Creative Talent Network Animation Expo in Burbank, California
- ctn, a notation for cotangent trigonometric function
- Camp Tel Noar, a USA summer camp
- Cardiac troponin, see troponin test
- Central de Trabajadores Nicaragüenses, the Nicaraguan Workers' Centre
- Cryptologic Technician, a U.S. Navy specialist rating
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