Channel 3 or TV 3 may refer to:
- Canal 3 (Burkina Faso), a commercial television channel in Burkina Faso
- Canal 3 (Guatemala), a commercial television channel in Guatemala
- Canal 3 (Portugal), a proposed television channel in Portugal
- Channel 3 (Algeria), a public Algerian TV channel owned by EPTV Group
- Channel 3 (Bulgaria), a Bulgarian TV station
- Channel 3 (Cambodia), a Cambodian TV station
- Channel 3 (Iran), channel of Islamic Republic of Iran Broadcasting
- Channel 3 (Thailand), a commercial station
- TV3 (Catalonia), a regional public Catalan television channel owned by CCMA
- TV3 (Czech Republic), defunct regional general entertainment channel
- TV3 (Malaysian TV network), a privately owned network
- Three (TV channel), a New Zealand station formerly named TV3
- TV3 (Hungary), defunct television channel
- Viasat 3, a Hungarian television channel
- FEM3, a defunct television channel
- M3 (Hungarian TV channel), a Hungarian television channel (named TV3 for a period of time)
- TV3 (Switzerland), defunct television channel
- TV3 (Viasat), a brand name of Nordic Entertainment Group's flagship entertainment TV channel, with several European national channels, including:
- TV3 Group (Baltics), a pan-Baltic commercial broadcasting company owned by Providence Equity Partners through Bitė Group in Lithuania, previously a part of Viasat operations
- TV-3 (Russia), a state owned station
- TVR3, a Romanian television channel, featuring classic movies
- TV3 Ghana, a privately owned station
- TV3 Winchester, cable-only ABC affiliate in Winchester, Virginia
- Channel 3 – Rosario, Argentine TV station
- Canal 3 Colonia, Uruguayan TV station
- BBC Three, a British television channel from the BBC
- Hot 3, formerly Channel 3 in Israel
- ITV (TV network), British commercial public broadcast network legally named Channel 3
- ITV Tyne Tees, previously known as Channel 3 North East from 1996–1998
- Medford Community Cablevision, Inc., a public-access station
- MTV3, a commercial station in Finland
- NPO 3, a public-broadcasting station in Nederland TV3
- NBN Television (Australia), originally known as Channel 3
- Rai 3, an Italian television channel
- South African Broadcasting Corporation TV 3, a channel operated by the state-owned broadcaster 1975–1996
- Imagen Televisión, which uses virtual channel 3 in Mexico
- Virgin Media Television (Republic of Ireland), formerly TV3 Group
For VHF frequencies covering 60-66 MHz: