TGM may refer to:
People Tomáš Garrigue Masaryk (1850–1937), first President of Czechoslovakia Gáspár Miklós Tamás (1948–2023), ), Hungarian philosopher
Organizations Târgu Mureș International Airport, IATA airport code in Romania Tellings-Golden Miller, UK bus company Tunis-Goulette-Marsa, a railway line in Tunisia TGM Grand Prix, a Japanese auto racing team The Games Machine, a former video game magazine The Games Machine (Italy), another video game magazine that is still running
Other Taipei Grand Mosque, a mosque in Taipei, Taiwan TGM is the station code for Teignmouth railway station Tetris: The Grand Master, a video game series Tom Pendlebury's TGM system, a System of measurement in Duodecimal Top Gun: Maverick, a 2022 action drama film Total gaseous mercury, a measurement of mercury concentration used in toxicology research Transglutaminase, an enzyme