TNN may refer to:
- The National Network, a former name of the U.S. TV channel Paramount Network
- The Nashville Network, an American country music-oriented cable television network
- Tainan Airport (IATA airport code
TNN), Tainan, Taiwan - Times News Network, a news agency started by The Times of India
- TNN Bass Tournament of Champions, fishing video game
- TNN Motorsports Hardcore Heat, racing video game
- TNN Radio, an American radio station in Anaheim, California
- TNN (Thai TV channel), a Thai news channel
- Tribal News Network, a Pakistani news network