IG, Ig, or ig may mean:


  • Immunoglobulin
  • Immature granulocyte


  • Ig, a town and a municipality in Slovenia
  • IG postcode area, a group of postcode districts around Ilford, England


  • Inspector General (civilian or military administration), a high-ranking official charged with the mission to inspect and report on some bodies in his field of competency
  • Igbo language, the official language of Nigeria (ISO 639 alpha-2, ig)
  • Insulated glass


  • IG Farben, a German industrial conglomerate
  • IG Group, a UK speculative investment company
  • iG - internet Group, a Brazilian internet service provider
  • Production I.G, a Japanese anime company
  • Impressions Games, a defunct United States gaming company
  • IATA airline designator for Meridiana Fly


  • Imperial Guard, from the tabletop strategy game, Warhammer 40,000 Universe
  • Imperium Galactica, a 1997 PC CD-ROM game by Hungary-based Digital Reality
  • Insomniac Games, an online slang term used by members of its community
  • Instagib, a mutator in various first person shooter games such as Unreal Tournament, Unreal Tournament 2003, and Unreal Tournament 2004
  • Investment Game, an international stock market simulation game


  • Inspector General
  • Inspector General of Police
  • Inspector General of Prisons


  • Ig Nobel Prize, a parody of the Nobel Prize (ignoble)
  • Inspector Gadget, a cartoon television show and movie
  • Italian Greyhound, a breed of dog
  • Islamic Group (Al-Gama'a al-Islamiyya), a militant Egyptian Islamist movement
  • Inverse gamma distribution, a common continuous distribution in Statistics
  • iGoogle, Google's personalized homepage
  • Indigo Girls, a folk/rock duo from the United States
  • Inscriptiones Graecae, a collection of ancient Greek sources
  • Integrated Graphics, graphics processor is integrated into the mainboard
  • Image Generator, for generation of images in 2D and 3D simulations