MGB may refer to:
Organisations Political alliances in India Mahagathbandhan (Bihar) Mahagathbandhan (Jharkhand) Mahagathbandhan (Uttar Pradesh)
Others Mass General Brigham, a Massachusetts-based health care system and research enterprise Matematička gimnazija Beograd, a school in Belgrade, Serbia Mines and Geosciences Bureau, a Philippine government agency Ministry of State Security (Soviet Union) (Ministerstvo Gosudarstvennoi Bezopasnosti), a predecessor of the KGB
Technology Matterhorn Gotthard Bahn, a railroad in the Swiss Alps Medium Girder Bridge, a modular military bridge MG MGB, a British sports car produced 1962–1980 Motor gunboat, a fast attack boat armed with cannons and guns MGB, a Nintendo CPU in some models of the Game Boy
Other uses Magandang Gabi... Bayan (Good Evening... Nation), a 1988–2005 Philippine news program Matthew Good Band, a Canadian alternative rock group Medial geniculate nucleus, or medial geniculate body, a subnucleus of the thalamus in the brain Mount Gambier Airport, South Australia (IATA code) Mangga Besar railway station, a railway station in Jakarta, Indonesia