ITG

• Iraqi Transitional Government (2005–2006), former ruling institution of Iraq
• International Textile Group, American textile firm
• International Trumpet Guild, trumpet players' organization
• Investment Technology Group, American firm
• In the Game Trading Cards, a manufacturer of hockey trading cards
• Institute of Tourist Guiding, UK's official tourist body
• Irish Traction Group, Irish railway preservation society
• ITG Brands, the US subsidiary of Imperial Tobacco Group

• Integrin, a type of membrane protein
• Inferior temporal gyrus, a region of the brain
• IT governance

• In The Groove (video game), a music video game

• Interconnector Turkey–Greece–Italy (ITGI), a natural gas pipeline

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