MG

MG, Mg, or mg and variants may mean:

Organizations
 MG Cars, an automotive marque of the now defunct MG Car Company
 MG Motor, a present-day car manufacturing company
 Champion Air (IATA code)
 Matematička gimnazija, a school in Belgrade
 Monte Generoso railway

Arts and entertainment
 MG, a character in The Perhapanauts comics
 Match Game, a television game show
 Magilla Gorilla

Music
 Main gauche, "left hand" in piano playing
 MG (Martin Gore album)
 The M.G.'s, from the band Booker T. & the M.G.'s
 The MG's (album), an album by the M.G.'s
 MG Select, a house duo music production including George Jackson

Military
 Machine gun (MG-), prefix for model designations, for example, "MG42"
 Major general, a military rank
 Medal for Gallantry, a military decoration

Places
 Madagascar (ISO 3166-1 country code MG)
 .mg, the Internet country code top-level domain for Madagascar
 Minas Gerais, Brazil
 Mongolia (FIPS 10-4 country code MG)

Science and technology
 .mg, the Internet country code top-level domain for Madagascar
 mg (editor), a text editing program
 Magnesium, a chemical element with symbol Mg
 Motor-generator, a device for converting electrical power to another form
 Manual Gates, a type of level crossing used in the United Kingdom
 Microgrid, a local architecture for power grid within the concept of Smart Grid that can function both connected to and isolanded from the main grid.

Biology and medicine
 Michaelis-Gutmann bodies, concentrically layered basophilic inclusions in the urinary tract
 Monoglyceride, or monoacylglycerol
 Myasthenia gravis, a neuromuscular disease
 Mycoplasma genitalium, a sexually transmitted bacterium

Units of measurement
 Milligram (mg), equal to 10−3 grams
 Megagram (Mg), equal to 106 grams
 Milligauss (mG), equal to 1.0 × 10−7 Teslas 
 Megagauss (MG), equal to 100 Teslas

Other uses
 Mg (magazine), an American business monthly
 Malagasy language
 Outlaw motorcycle club (motorcycle gang)
 Matt Groening