TMG may refer to:
Computing TMG (language) Microsoft Forefront Threat Management Gateway The Master Genealogist, software
Science and technology Tensiomyography, for detecting muscle properties Tetramethylguanidine, a superbase Trimethylglycine, an amino acid derivative Trimethylgallium, Ga(CH3)3 Touring motor glider Thermal Micrometeoroid Garment, the outer layer of a space suit Thermomechanical generator, the Harwell Stirling engine
Music Ted Mulry Gang, an Australian rock group The Militia Group, a record label Tak Matsumoto Group, a Japanese supergroup Tiny Meat Gang, an American rap comedy duo The Mountain Goats, an American indie rock band
Other media Tele München Gruppe, Munich, Germany Telegraaf Media Groep, Netherlands The Messina Group, a global strategic consulting firm founded in 2013 by Jim Messina Times Media Group, South Africa TMG Studios, an American podcast company and production studio
Other uses Tunney Media Group, fictional owner of NBS on Studio 60 on the Sunset Strip Tennessee Meiji Gakuin High School Têxtil Manuel Gonçalves, a Portuguese company The Monitoring Group, a UK anti-racist charity Former NYSE symbol for TransMontaigne Trident Media Guard, a French anti-software-piracy company Tunisia Monitoring Group, a free-expression group Toyota Motorsport GmbH, Cologne, Germany The Motorsports Group, a US team