TNW may refer to:
Tactical nuclear weapon, a nuclear weapon which is designed to be used on a battlefield in military situations Tonsawang language (ISO 639 code: tnw) Trans Nation Airways (ICAO airline code: TNW) Ethiopian airline Jumandy Airport (IATA airport code: TNW) in Tena, Napo Province, Ecuador Mayor Galo de la Torre Airport (IATA airport code: TNW) defunct airport in Tena, Napo Province, Ecuador Tin Creek Airport (FAA airport code: TNW) in Farewell Lake, Alaska, USA; see List of airports in Alaska Warsaw Scientific Society (Polish: Towarzystwo Naukowe Warszawskie) "TNW" Tarifverbund Nordwestschweiz, Swiss public transit tariff network Latin-script trigraph (tnw) for Arrernte, see List of Latin-script trigraphs Team Ninja Warrior, U.S. TV series based on SASUKE/Ninja Warrior telesport The Next Web, a website The Northern Whig, bar in Belfast, Northern Ireland The Northern Whig, Irish newspaper