- UniMásCountry: United StatesFounded: 2002
- Universal KidsCountry: United StatesFounded: September 26, 2005
- UnivisionCountry: United States, MexicoFounded: September 25, 1962
- UPNCountry: United StatesFounded: January 16, 1995
- UPN KidsFounded: September 10, 1995Animated series: 2
- USA Action Extreme TeamAnimated series: 1Format: television series
- USA NetworkCountry: United StatesFounded: 1977
- USSR State Committee for Television and RadioCountry: Soviet UnionFounded: September 10, 1931