IGA or IgA may refer to: Businesses and organizations IGA (supermarkets) (initially Independent Grocers Alliance), a name used by many independent supermarkets throughout the world IGA (Australian supermarket group), the local Australian variant of the international IGA International Island Games Association, an organization that organizes the Island Games (a friendly competition between teams from several islands and other small territories) International Grenfell Association, an organization providing health care, education, religious and other services to the fishermen and coastal communities in Newfoundland and Labrador Interscope-Geffen-A&M, an American record label Irish Games Association, a non-profit body which is dedicated to promoting gaming in Ireland International Gay Association, the original name of the International Lesbian, Gay, Bisexual, Trans and Intersex Association In government Illinois General Assembly Indiana General Assembly Iowa General Assembly In science and technology Immunoglobulin A (IgA), an antibody playing a critical role in mucosal immunity Intergranular attack, another term for intergranular corrosion (a form of corrosion where the boundaries of crystallites of the material are more susceptible to corrosion than their insides) Other uses Identity Governance and Administration, the organisational policies, processes and procedures controlling identity management In-game advertising, the use of computer and video games as a medium in which to deliver advertising International Gamers Award, an award for strategy board games and historical simulation games Islamic Golden Age, a period in the history of the Muslim world Koji Igarashi, a Japanese video game producer, nicknamed IGA See also Iga (disambiguation)