Channel 21
- 21 (disambiguation)
- CHNU-DT-1
- CJON-DT
- Canal Orbe 21
- Channel 21 (Germany)
- Channel 21 TV stations in Canada
- Channel 21 TV stations in Mexico
- Channel 21 branded TV stations in the United States
- Channel 21 digital TV stations in the United States
- Channel 21 low-power TV stations in the United States
- Channel 21 virtual TV stations in the United States
- Citytv Bogota
- ETC-21
- El Watania 2
- Enlace Nicaragua
- L'Équipe 21
- RTL9
- Rede 21
- TV 21 (North Macedonia)
- TV Century 21
- Tipik (TV channel)
- XHCDM-TDT
- XHTIT-TDT