STG may refer to:
Arts and entertainment Star Trek Generations, a 1995 sci-fi film Strike Gunner S.T.G, a 1991 arcade video game Governments Syrian transitional government
Military Sonar Technician surface, a United States Navy rating Sturmgewehr (StG), a German assault rifle Sturzkampfgeschwader (StG), in Organization of the Luftwaffe (1933–45)
Organizations School of Transnational Governance, of the European University Institute Security Threat Group, a prison gang Somali Telecom Group, a Somalian telecommunications company Scandinavian Tobacco Group, a Danish cigar and tobacco company Special Tactics Group, a New Zealand Police counter-terrorism unit Slaves to Gravity, a British band Symphony Technology Group, an American private equity firm
Science, technology and mathematics Superior temporal gyrus in the human brain Stomatogastric ganglion in arthropods Steam turbine generator, an electric generator Spineless Tagless G-machine in the Glasgow Haskell Compiler Signal Transition Graph, a special type of Petri net
Other uses As a historical abbreviation of "Sterling", the currency of the United Kingdom (more widely known as the Pound sterling) St. George Airport (Alaska), US, by IATA code Stirling railway station, Scotland, by station code Shoot 'em up, video game genre University of Toronto St. George, with "St. George" occasionally abbreviated as "STG"