IAG may refer to:

• Niagara Falls International Airport

• Individualized Apparel Group, American clothing holding company
• Industrial Alliance Group, Canadian Insurance Company
• Insurance Australia Group, an insurance company in Australia
• International Airlines Group, holding company of Aer Lingus, British Airways, Iberia, Level and Vueling
• International Audio Group, a manufacturer of hi-fi equipment

• IAg, Immersion Silver plating, a conductor plating technology used for printed circuit boards
• I Am Ghost, a post-hardcore band from Long Beach, California
• I Am Groot, a series of animated shorts
• Idiopathic adolescent gynecomastia, a medical condition
• International Association of Geodesy, part of the International Union of Geodesy and Geophysics
• Iraq Assistance Group, a former U.S. military command
• Louvain School of Management, formerly Institut d'Administration et de Gestion of the University of Louvain (UCLouvain)
• Microsoft Intelligent Application Gateway, a combined hardware and software computer product by Microsoft

This disambiguation page lists articles associated with the title IAG.
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