- K2Country: UkraineFounded: July 31, 2005
- K2Country: ItalyFounded: October 1, 2004
- KabillionAnimated series: 1First series: 2006
- Kaku Children's TelevisionAnimated series: 3Format: television program
- Kanal 5Country: SwedenFounded: March 27, 1989
- Kansai Telecasting CorporationCountry: JapanFounded: February 1, 1958
- Katholieke Radio OmroepCountry: NetherlandsFounded: 1925
- KBS 1TVCountry: South KoreaFounded: 1961
- KBS 2TVCountry: South KoreaFounded: December 7, 1965
- KBS KidsCountry: South KoreaAnimated series: 1
- KetnetCountry: BelgiumFounded: December 1, 1997
- Kids CentralCountry: United StatesAnimated series: 1
- Kids StationCountry: JapanFounded: 1993
- Kids' WBFounded: September 9, 1995Animated series: 19
- KidsCoCountry: GermanyFounded: 2007
- Kidz/AnimezCountry: TurkeyAnimated series: 1
- KiKAFounded: 1995Animated series: 12
- KindernetCountry: NetherlandsFounded: 1988
- Kino PolskaCountry: PolandFounded: December 20, 2003
- KinopoiskCountry: RussiaFounded: November 7, 2003
- Knowledge KidsCountry: CanadaFounded: 1996
- Korean Central TelevisionCountry: North KoreaFounded: March 3, 1963
- KTLACountry: United StatesFounded: 1939
- Kyoto Broadcasting SystemCountry: JapanFounded: 1951